1350+ Adjectives That Start With I

We use adjectives to describe people or things. Adjectives that start with I include:

immense, important, incredible, ineffective, and interesting.

Adjectives are words that modify nouns or pronouns. They can describe the physical appearance of a person or thing, or they can describe the personality of a person. Adjectives that start with I can be used to describe both the physical and personality traits of a person or thing.

Adjectives That Start With The Letter I

If you’re looking for a list of adjectives that start with I, you’ve come to the right place! Here are some common and not-so-common adjectives starting with I:

• Intelligent: Having the ability to think, learn, and understand complex ideas.
• Interesting: Holding the attention of others; causing curiosity or fascination.
• Intense: Showing strong feeling or emotion; concentrated.
• Incredible: Too good or amazing to be believed.
• Independent: Not influenced or controlled by others; able to think or act without help from others.
• Innovative: Introducing new ideas or methods; original and creative.
• Intimate: Closely connected or affectionate; private or personal.
• Intrepid: Fearless and daring; brave.

Whether you’re looking for a descriptor for someone’s personality or for a situation, one of these adjectives is sure to fit the bill. With such a wide range of meanings, you’re sure to find the perfect word to describe what you’re looking for.

39 Adjectives That Start With IA, IB, IC

Iambic	Of or using iambs.Iambic verse as a genre.
Iatrochemical	chemistry combined with medicine — compare iatrophysics
Iberian	Relating to or denoting Iberia, or the countries of Spain and Portugal.A native of Iberia, especially in ancient times.The extinct Romance language spoken in the Iberian peninsula in late classical times. It forms an intermediate stage between Latin and modern Spanish, Catalan, and Portuguese.The extinct Celtic language spoken in the Iberian peninsula in ancient times, known only from a few inscriptions, place names, and references by Latin authors.
Icarian	Relating to or characteristic of Icarus, especially in being excessively ambitious.
Iced	(of a drink or other liquid) cooled in or mixed with pieces of ice.(of a cake or cookie) decorated with icing.
Ice-Free	Free from or not covered by ice.
Icelandic	Relating to Iceland or its language.The North Germanic language of Iceland, which is very similar to Old Norse.
Ichthyic	Fishlike.
Icier	Covered with or consisting of ice.
Iciest	Covered with or consisting of ice.
Ickier	informal
Ickiest	informal
Icky	informal
Iconic	Relating to or of the nature of an icon.
Icy	Covered with or consisting of ice.

Iatric	Iatrogenic	Ibsenian
Ice-Cube	Ichnographic	Ichnographical
Ichorous	Ichthyoid	Ichthyolitic
Ichthyological	Ichthyophagous	Ichthyosaurian
Ichthyotic	Iconoclastic	Iconomatic
Icosahedral	Icteric	Ictic

60 Adjectives Starting With ID, IF, IG

Idaean	Of, relating to, or living on Mount Ida, either (a) a mountain in Asia Minor near ancient Troy; or (b) the chief mountain in Crete, in some versions of Greek mythology the birthplace of Zeus.
Idahoan	Relating to or characteristic of the US state of Idaho or its inhabitants.A native or inhabitant of the US state of Idaho.
Ideal	Satisfying one’s conception of what is perfect; most suitable.attributiveA person or thing regarded as perfect.
Idealess	Having no ideas; conveying no idea, meaningless.
Idealist	A person who is guided more by ideals than by practical considerations.Philosophy
Ideative	Ideational.
Idem	Used in citations to indicate an author or work that has just been mentioned.
Identical	Similar in every detail; exactly alike.Logic Mathematics
Ideologic	Ideological 3.
Ideomotor	Designating or relating to movements that are determined by or involve ideation, and parts of the brain involved in the production of such movements.Medicine
Idiomatic	Using, containing, or denoting expressions that are natural to a native speaker.Appropriate to the style of art or music associated with a particular period, individual, or group.
Idle	(of a person) avoiding work; lazy.Without purpose or effect; pointless.no object(of an engine) run slowly while disconnected from a load or out of gear.
Idled	(of a person) avoiding work; lazy.Without purpose or effect; pointless.no object(of an engine) run slowly while disconnected from a load or out of gear.
Idlest	(of a person) avoiding work; lazy.Without purpose or effect; pointless.no object(of an engine) run slowly while disconnected from a load or out of gear.
Idling	(of a person) avoiding work; lazy.Without purpose or effect; pointless.no object(of an engine) run slowly while disconnected from a load or out of gear.
Idolized	Admire, revere, or love greatly or excessively.
Idyllic	(especially of a time or place) like an idyll; extremely happy, peaceful, or picturesque.
Iffy	informal
Ignorant	Lacking knowledge or awareness in general; uneducated or unsophisticated.
Iguana	A large, arboreal, tropical American lizard with a spiny crest along the back and greenish coloration, occasionally kept as a pet.

Idealistic	Identified	Idiographic
Idealized	Identifying	Idiomatical
Ideational	Ideographic	Idiomorphic
Idempotent	Ideographical	Idiopathic
Identic	Ideological	Idiorrhythmic
Identifiable	Idioblastic	Idiosyncratic

Idiotic	Ignitible	Ignitable
Idolatrous	Ignoble	Ignored
Igneous	Ignominious	Ignited
Ignescent	Ignorable	Iguanid

60 Words That Start With IL Adjectives

Ileac	of, relating to, or affecting the ileum
Iliac	Relating to the ilium or the nearby regions of the lower body.
Ilka	Each, every.
Ill	Not in full health; sick.attributiveusually in combinationOnly with difficulty; hardly.usually ills
Ill-Advised	Unwise or imprudent.
Ill-Affected	Not inclined to be friendly or sympathetic.
Ill-Assorted	Not well matched.
Illative	Of the nature of or stating an inference.Grammar The illative case, or a word in this case.
Illaudable	deserving no praise
Ill-Behaved	Behaving badly.
Ill-Bred	Badly brought up or rude.
Ill-Conceived	Not carefully planned or considered.
Ill-Conditioned	having a bad temper or mean disposition
Ill-Considered	Badly thought out.
Ill-Defined	Not having a clear description or limits; vague.
Ill-Disposed	Unfriendly or unsympathetic.
Illegal	Contrary to or forbidden by law, especially criminal law.A person present in a country without official authorization.
Illegible	Not clear enough to be read.
Illegitimate	Not authorized by the law; not in accordance with accepted standards or rules.A person who is illegitimate by birth.
Ill-Equipped	not having the experience or preparation that is needed
Ill-Fated	Destined to fail or have bad luck.
Ill-Favored	Unattractive or offensive.
Ill-Favoured	Unattractive or offensive.
Ill-Founded	(especially of an idea or belief) not based on fact or reliable evidence.
Ill-Gotten	Acquired by illegal or unfair means.
Illiberal	Opposed to liberal principles; restricting freedom of thought or behavior. archaic archaic
Illicit	Forbidden by law, rules, or custom.
Illimitable	Without limits or an end.
Illinoian	Relating to or denoting a Pleistocene glaciation in North America, preceding the Wisconsin and approximating to the Saale of northern Europe.The Pleistocene glaciation in North America or the system of deposits laid down during it.
Illinois	A state in the eastern central US; population 12,901,563 (est. 2008); capital, Springfield. It was colonized by the French but was ceded to Britain in 1763. It was acquired by the US in 1783 and became the 21st state in 1818.
Illiquid	(of assets) not easily converted into cash.
Illiterate	Unable to read or write.A person who is unable to read or write.
Ill-Judged	Lacking careful consideration; unwise.
Ill-Looking	not pleasant in appearance
Ill-Mannered	Having bad manners; not behaving well in social situations.
Ill-Natured	Bad-tempered or mean-spirited.
Illogical	Lacking sense or clear, sound reasoning.
Ill-Omened	Attended by bad omens.
Ill-Starred	Destined to fail or have many difficulties; unlucky.
Ill-Tempered	ill-natured, quarrelsome
Ill-Timed	Done or occurring at an inappropriate time.
Ill-Treated	Act cruelly toward (a person or animal)
Illuminable	illuminate
Illuminant	A means of lighting or source of light.Giving off light.
Illuminate	Make (something) visible or bright by shining light on it; light up.Help to clarify or explain.Decorate (a page or letter in a manuscript) by hand with gold, silver, or colored designs.
Illuminated	Lit with bright lights.(of a manuscript) having pages or letters decorated by hand with gold, silver, or colored designs.
Illuminating	Helping to clarify or explain something.
Illuminative	of, relating to, or producing illumination
Ill-Used	Ill-treat (someone)Ill-treatment.
Illusive	Deceptive; illusory.
Illusory	Based on illusion; not real.
Illustrated	(of a book, newspaper, etc.) containing pictures or other graphical material.
Illustrational	something that serves to illustrate
Illustrative	Serving as an example or explanation.
Illustrious	Well known, respected, and admired for past achievements.
Illuvial	of, relating to, or marked by illuviation or illuviated materials or areas
Illyrian	Relating to the ancient region of Illyria or its language.A native or inhabitant of ancient Illyria.

Ill-Boding

Ill-Humoured

Ill-Spent

174 Adjectives Beginning With IM

Imaginable	Possible to be thought of or believed.
Imaginal	Relating to an image.Entomology
Imaginary	Existing only in the imagination.Mathematics
Imaginative	Having or showing creativity or inventiveness.
Imagined	(of something unreal or untrue) believed to exist or be so.
Imagism	A movement in early 20th-century English and American poetry which sought clarity of expression through the use of precise images. The movement derived in part from the aesthetic philosophy of T. E. Hulme and involved Ezra Pound, James Joyce, Amy Lowell, and others.
Imbecile	A stupid person.Stupid; idiotic.
Imbricate	(of scales, sepals, plates, etc.) having adjacent edges overlapping.Overlap or cause to overlap.
Imbricated	(of scales, sepals, plates, etc.) having adjacent edges overlapping.Overlap or cause to overlap.
Imbued	Inspire or permeate with (a feeling or quality)
Imitation	The action of using someone or something as a model.A thing intended to simulate or copy something else.
Imitative	Copying or following a model or example.(of a word) reproducing a natural sound (e.g. fizz) or pronounced in a way that is thought to correspond to the appearance or character of the object or action described (e.g. blob).
Immaculate	(especially of a person or their clothes) perfectly clean, neat, or tidy.
Immane	Inhumanly cruel or savage; brutal.Of immense size or strength; huge, vast, enormous.
Immanent	Existing or operating within; inherent.
Immaterial	Unimportant under the circumstances; irrelevant.Philosophy
Immature	Not fully developed.
Immeasurable	Too large, extensive, or extreme to measure.
Immediate	Occurring or done at once; instant.Nearest in time, relationship, or rank.Philosophy
Immedicable	Unable to be healed or treated; incurable.
Immemorial	Originating in the distant past; very old.
Immense	Extremely large or great, especially in scale or degree.
Immersed	Dip or submerge in a liquid.immerse oneself or be immersed
Immethodical	not methodical
Imminent	About to happen. archaic
Immiscible	(of liquids) not forming a homogeneous mixture when added together.
Immitigable	Unable to be made less severe or serious.
Immobile	Not moving; motionless.
Immoderate	Not sensible or restrained; excessive.
Immodest	Lacking humility or decency.
Immoral	Not conforming to accepted standards of morality.
Immortal	Living forever; never dying or decaying.An immortal being, especially a god of ancient Greece or Rome.
Immotile	Not motile.
Immovable	Not able to be moved.immovables
Immoveable	Not able to be moved.immovables
Immune	Resistant to a particular infection or toxin owing to the presence of specific antibodies or sensitized white blood cells.
Immunized	Make (a person or animal) immune to infection, typically by inoculation.
Immunogenic	Relating to or denoting substances able to produce an immune response.
Immunological	Relating to or involving immunity to infections or toxins.
Immunosuppressive	causing or characterized by immunosuppression
Immutable	Unchanging over time or unable to be changed.
Impacted	Medicine Strongly affected by something.
Impactive	Having a strong effect or influence; making an impression.
Impaired	Weakened or damaged.Having a disability of a specified kind.
Impalpable	Unable to be felt by touch.
Imparipinnate	odd-pinnate
Impartial	not partial or biased
Impassable	Impossible to travel along or over.
Impassible	Incapable of suffering or feeling pain.
Impassioned	Filled with or showing great emotion.
Impassive	Not feeling or showing emotion.
Impeccable	(of behavior, performance, or appearance) in accordance with the highest standards of propriety; faultless.
Impeccant	free from error or fault
Impecunious	Having little or no money.
Impeded	Delay or prevent (someone or something) by obstructing them; hinder.
Impeding	Delay or prevent (someone or something) by obstructing them; hinder.
Impel	Drive, force, or urge (someone) to do something.
Impelled	Drive, force, or urge (someone) to do something.
Impelling	Drive, force, or urge (someone) to do something.
Impendent	being near at hand
Impending	(of an event regarded as threatening or significant) about to happen; forthcoming.
Impenitent	Not feeling shame or regret about one’s actions or attitudes.
Imperative	Of vital importance; crucial.Giving an authoritative command; peremptory.An essential or urgent thing.Grammar
Imperceptible	Impossible to perceive.
Imperceptive	Lacking in perception or insight.
Impercipient	the quality or state of being imperceptive
Imperfect	not perfect
Imperfectible	Of a note
Imperfective	expressing action as incomplete or without reference to completion or as reiterated — compare perfective
Imperforate	Anatomy Zoology (of a postage stamp or a block or sheet of stamps) lacking perforations, especially as an error.
Imperial	Relating to an empire.Relating to or denoting the system of nonmetric weights and measures (the ounce, pound, stone, inch, foot, yard, mile, acre, pint, gallon, etc.) formerly used for all measures in the UK, and still used for some.mainly historical A small pointed beard growing below the lower lip (associated with Napoleon III of France).
Imperialist	Of, relating to, supporting, or practicing imperialism.A person who supports or practices imperialism.
Imperialistic	Relating to or characterized by a policy of imperialism.
Imperious	Assuming power or authority without justification; arrogant and domineering.
Imperishable	not perishable or subject to decay
Impermanent	Not permanent.
Impermeable	Not allowing fluid to pass through.
Impermissible	not permissible
Impertinent	Not showing proper respect; rude. formal
Imperturbable	Unable to be upset or excited; calm.
Imperviable	That cannot be penetrated or passed through; impermeable, impervious. Also figurative
Impervious	Not allowing fluid to pass through.
Impetiginous	of, relating to, or resembling impetigo
Impetuous	Acting or done quickly and without thought or care.
Impingent	impinging
Impious	Not showing respect or reverence, especially for a god.
Impish	Inclined to do slightly naughty things for fun; mischievous.
Implacable	Unable to be placated.
Implanted	Insert or fix (tissue or an artificial object) in a person’s body, especially by surgery.A thing implanted in something else, especially a piece of tissue, prosthetic device, or other object implanted in the body.
Implausible	(of an argument or statement) not seeming reasonable or probable; failing to convince.
Implemental	of, relating to, or being an implement or relating to or providing implementation
Implemented	A tool, utensil, or other piece of equipment, especially as used for a particular purpose.Put (a decision, plan, agreement, etc.) into effect.
Implicated	Show (someone) to be involved in a crime.with clauseA thing implied.
Implicative	Tending to imply something; conveying a meaning indirectly.
Implicit	Implied though not plainly expressed.implicit inWith no qualification or question; absolute.Mathematics
Implied	Suggested but not directly expressed; implicit.
Imploring	Making an earnest or desperate appeal.
Implosive	Formed by implosion; tending to implode.
Impolite	Not having or showing good manners; rude.
Impolitic	Failing to possess or display prudence; unwise.
Imponderable	A factor that is difficult or impossible to estimate or assess.Difficult or impossible to estimate, assess, or answer. archaic
Important	Of great significance or value; likely to have a profound effect on success, survival, or well-being.
Imported	(of goods or services) brought into a country from abroad for sale.
Importunate	Persistent, especially to the point of annoyance or intrusion.
Imposed	with objectno objectPrinting
Imposing	Grand and impressive in appearance.
Impossible	incapable of being or of occurring
Impotent	Unable to take effective action; helpless or powerless.(of a man) abnormally unable to achieve a sexual erection.
Impoundable	capable of or liable to impoundment
Impractical	(of an object or course of action) not adapted for use or action; not sensible or realistic.mainly North American
Imprecatory	curse
Imprecise	Lacking exactness and accuracy of expression or detail.
Impregnable	incapable of being taken by assault
Impregnate	Make (a woman or female animal) pregnant.usually be impregnated with
Imprescriptible	(of rights) unable to be taken away by prescription or by lapse of time.
Impressed	Feeling or showing admiration or respect for someone or something.(of a mark) applied to something using pressure.(of an electric current or potential) applied from an external source.
Impressible	to affect especially forcibly or deeply
Impressionistic	Based on subjective reactions presented unsystematically.
Impressive	Evoking admiration through size, quality, or skill; grand, imposing, or awesome.
Imprisoned	Kept in prison
Improbable	Not likely to be true or to happen.
Impromptu	Done without being planned, organized, or rehearsed.Without being planned, organized, or rehearsed.A short piece of instrumental music, especially a solo, that is reminiscent of an improvisation.
Improper	Not in accordance with accepted rules or standards, especially of morality or honesty.
Improved	Having become or been made better.
Improvident	Not having or showing foresight; spendthrift or thoughtless.
Improving	Make or become better.
Improvisational	the act or art of improvising
Improvisatory	Created and performed spontaneously or without preparation.
Improvised	Created and performed spontaneously or without preparation; impromptu.
Imprudent	Not showing care for the consequences of an action; rash.
Impudent	Not showing due respect for another person; impertinent.
Impugnable	to assail by words or arguments
Impuissant	Unable to take effective action; powerless.
Impulsive	Acting or done without forethought.Physics
Impure	Mixed with foreign matter; adulterated.Morally wrong, especially in sexual matters.

Imageable	Imitable	Impassionate
Imagist	Immensurable	Impatient
Imagistic	Immersible	Impavid
Imbecilic	Imparisyllabic	Impeachable
Imbibitional	Impartable	Impedimental
Imidic	Impartible	Impeditive

Impellent	Impetratory	Impracticable
Impenetrable	Implacental	Impregnated
Impennate	Imploratory	Impressionable
Imperatorial	Importable	Impressionist
Impersonal	Imposable	Imprisonable
Impetrative	Impoverished	Impropriate
Improvable	Imputable	Imputative

876 Adjectives That Start With IN

Inane	Silly; stupid.
Inappropriate	Not suitable or proper in the circumstances.
Inartistic	Having or showing a lack of skill or talent in art.
Inboard	Situated on, toward, or near the center of a ship or aircraft.Within or toward the center of a ship or aircraft.A boat’s engine housed inside its hull.
Inborn	Existing from birth.
Inbound	Traveling toward a particular place, especially when returning to the original point of departure.Toward a particular place, especially when returning to the original point of departure.Throw (the ball) from out of bounds, putting it into play.
Inbred	Produced by inbreeding.Existing in a person, animal, or plant from birth; congenital. derogatory Biology
Inbreed	Breed from closely related people or animals, especially over many generations.
Incased	Enclose or cover in a case or close-fitting surround.
Incised	Mark or decorate (an object or surface) with a cut or a series of cuts.
Included	to take in or comprise as a part of a whole or group
Incog	(of a person) having one’s true identity concealed.In a way that conceals one’s true identity.
Incognizable	incapable of being recognized, known, or distinguished
Incommutable	not commutable
Incompatible	(of two things) so opposed in character as to be incapable of existing together.
Inconceivable	Not capable of being imagined or grasped mentally; unbelievable.
Incontrovertible	Not able to be denied or disputed.
Incorrupt	(especially of a human body) not having undergone decomposition.
Increate	uncreated
Incrust	Cover (something) with a hard surface layer.
Incunabular	relating to or typical of incunabula
Incuse	An impression hammered or stamped on a coin.Mark (a coin) with a figure by impressing it with a stamp.Hammered or stamped on a coin.
In-Depth	covering many or all important points of a subject
Indic	of or relating to the subcontinent of India
Indiscerptible	not discerptible
Indiscreet	not discreet
Indiscriminative	undiscriminating
Indivertible	not to be diverted or turned aside
Indivisible	Unable to be divided or separated.
Indoor	Situated, conducted, or used within a building or under cover.
Indrawn	attributive(of a person) shy and introspective.
Induced	Succeed in persuading or influencing (someone) to do something.Bring about or give rise to.Medicine Logic
Inductive	Characterized by the inference of general laws from particular instances.Relating to or caused by electric or magnetic induction.
Inedible	not fit to be eaten
Inept	Having or showing no skill; clumsy.
Inexact	Not quite accurate or correct.
Inexhaustible	(of an amount or supply of something) unable to be used up because existing in abundance.
Infant	A very young child or baby.
Infested	to spread or swarm in or over in a troublesome manner
Infidel	A person who does not believe in religion or who adheres to a religion other than one’s own.Adhering to a religion other than one’s own.
Infinitesimal	Extremely small.An indefinitely small quantity; a value approaching zero.
Infirm	Not physically or mentally strong, especially through age or illness.
Influent	flowing in
Influenzal	an acute, highly contagious, respiratory disease caused by any of three orthomyxoviruses:
Inform	reporting verbwith object
Informed	having information
Infrasonic	Relating to or denoting sound waves with a frequency below the lower limit of human audibility.
Infundibulate	having an infundibulum
Ingoing	Going into or toward a particular place.
Ingrain	Firmly fix or establish (a habit, belief, or attitude) in a person.(of a textile) composed of fibers which have been dyed different colors before being woven.
Ingrate	An ungrateful person.Ungrateful.
Ingratiating	Intended to gain approval or favor; sycophantic.
Ingrown	Growing or having grown within a thing; innate.
Inhaled	Breathe in (air, gas, smoke, etc.)
Inhibiting	Hinder, restrain, or prevent (an action or process)Make (someone) self-conscious and unable to act in a relaxed and natural way.(in ecclesiastical law) forbid (a member of the clergy) to exercise clerical functions.
Inhospitable	not showing hospitality
Inhuman	Lacking human qualities of compassion and mercy; cruel and barbaric.Not human in nature or character.
Inimitable	not capable of being imitated
Inkier	As dark as ink.Stained with ink.
Inkiest	As dark as ink.Stained with ink.
Inky	As dark as ink.Stained with ink.
Inlaid	Ornamented with embedded pieces of a decorative material flush with the surface.
Inland	Situated in the interior of a country rather than on the coast.In or toward the interior of a country.The parts of a country remote from the sea or borders; the interior.
Inmost	Innermost.
Innate	Inborn; natural.
Innumerous	innumerable
Inoperable	not treatable or remediable by surgery
Inordinate	exceeding reasonable limits
Inphase	a particular appearance or state in a regularly recurring cycle of changes
Inrush	The sudden arrival or entry of something.
Insane	In a state of mind which prevents normal perception, behavior, or social interaction; seriously mentally ill.mainly US
Insecticidal	destroying or controlling insects
Insectile	Resembling or reminiscent of an insect or insects.
Insensate	Lacking physical sensation.
Insentient	lacking perception, consciousness, or animation
Inseparable	incapable of being separated or disjoined
Inshore	situated, living, or carried on near shore
Inside	usually in singularThe inner part; the interior.the insideSituated on or in, or derived from, the inside.Situated with the boundaries or confines of.In less than (the period of time specified)Within the boundaries or confines of a place.
Insoluble	Impossible to solve.(of a substance) incapable of being dissolved.
Instructible	That may be instructed; amenable to instruction; especially teachable.
Intact	Not damaged or impaired in any way; complete.
Intellectualism	The exercise of the intellect at the expense of the emotions.
Intelligent	having or indicating a high or satisfactory degree of intelligence and mental capacity
Intense	existing in an extreme degree
Intent	Intention or purpose.intent on/upon(especially of a look) showing earnest and eager attention.
Intercessory	the act of interceding
Interconvertible	mutual conversion
Intercrossed	(with reference to animals or plants of different breeds or varieties) interbreed or cause to interbreed.An instance of intercrossing of animals or plants.
Interjacent	lying or being between or among others
Intermontane	situated between mountains
Intern	A student or trainee who works, sometimes without pay, at a trade or occupation in order to gain work experience.with objectNorth American
International	of, relating to, or affecting two or more nations
Interramal	situated between rami especially of the lower jaw
Intersecting	to pierce or divide by passing through or across
Interstate	of, connecting, or existing between two or more states especially of the U.S.
Intertarsal	situated, occurring, or performed between tarsal bones
Intertidal	of, relating to, or being the part of the littoral zone above low-tide mark
Intertissued	interwoven
Intimidating	Having a frightening, overawing, or threatening effect.
Intracranial	Within the skull.
Intramolecular	Existing or taking place within a molecule.
Intramural	Situated or done within the walls of a building.
Intransitive	(of a verb or a sense or use of a verb) not taking a direct object, e.g. look in look at the sky.An intransitive verb.
Intrinsic	Belonging naturally; essential.
Inured	usually be inured toinure for/to
Invading	(of an armed force or its commander) enter (a country or region) so as to subjugate or occupy it.
Invalidated	Make (an argument, statement, or theory) unsound or erroneous.Deprive (an official document or procedure) of legal efficacy because of contravention of a regulation or law.
Invected	Having convex semicircular projections along the edge.
Invertebrate	lacking a spinal column
Investigable	investigatable
Invincible	Too powerful to be defeated or overcome.
Inward	Directed or proceeding toward the inside; coming in from outside.Toward the inside.
Inwrought	(of a fabric or garment) intricately embroidered with a particular pattern or decoration.

Inaccessible	Inadvertent	Inappeasable
Inaccurate	Inadvisable	Inappellable
Inactive	Inalienable	Inappetent
Inadaptable	Inalterable	Inapplicable
Inadequate	In-And-In	Inapposite
Inadmissible	Inanimate	Inappreciable

Inappreciative	Inartificial	In-Between
Inapprehensible	Inattentive	In-Built
Inapprehensive	Inaudible	Inby
Inapproachable	Inaugural	Incalculable
Inapt	Inauspicious	Incalescent
Inarticulate	Inauthentic	Incan

Incandescent	Incapacitating	Incendiary
Incantational	In-Car	Incensed
Incantatory	Incarcerate	Incentive
Incapable	Incarnadine	Inceptive
Incapacious	Incarnate	Incertain
Incapacitated	Incautious	Incessant

Incestuous	Incisive	Inclinational
Inchoate	Incisory	Inclinatory
Inchoative	Incitant	Inclined
Incident	Incivil	Includable
Incidental	Inclement	Includible
Incipient	Inclinable	Inclusive

Incoercible	Incognoscible	Incommodious
Incogitable	Incoherent	Incommunicable
Incogitant	Incombustible	Incommunicado
Incognita	Incoming	Incommunicative
Incognito	Incommensurable	Incomparable
Incognizant	Incommensurate	Incompetent

Incomplete	Inconclusive	Inconsequent
Incompliant	Incondensable	Inconsequential
Incomprehensible	Incondite	Inconsiderable
Incomprehensive	Incongruent	Inconsiderate
Incompressible	Incongruous	Inconsistent
Incomputable	Inconsecutive	Inconsolable

Inconsonant	Incontrollable	Incorporated
Inconspicuous	Inconvenient	Incorporating
Inconstant	Inconvertible	Incorporative
Inconsumable	Inconvincible	Incorporeal
Incontestable	Incoordinate	Incorrect
Incontinent	Incorporate	Incorrigible

Incorruptible	Incredible	Incubative
Incrassate	Incredulous	Incubatory
Incrassative	Incremental	Incubous
Increasable	Increscent	Inculcative
Increased	Incriminating	Inculpable
Increasing	Incriminatory	Inculpatory

Incult	Incursive	Indeciduate
Incumbent	Incurvate	Indeciduous
Incurable	Incurved	Indecipherable
Incurious	Indagative	Indecisive
Incurrable	Indebted	Indeclinable
Incurrent	Indecent	Indecomposable

Indecorous	Indefinite	Indentured
Indefatigable	Indehiscent	Independent
Indefeasible	Indelible	Indescribable
Indefectible	Indelicate	Indestructible
Indefensible	Indemonstrable	Indeterminable
Indefinable	Indented	Indeterminate

Indeterminism	Indicative	Indigent
Indeterminist	Indicatory	Indigested
Indexical	Indicial	Indigestible
Indexless	Indictable	Indigestive
Index-Linked	Indifferent	Indign
Indian	Indigenous	Indignant

Indigo-Blue	Indiscriminating	Indistinctive
Indirect	Indispensable	Indistinguishable
Indiscernible	Indisposed	Individual
Indiscoverable	Indisputable	Individualist
Indiscrete	Indissoluble	Individualistic
Indiscriminate	Indistinct	Individualized

Indo-Aryan	Indomitable	Indulgent
Indocile	Indonesian	Induplicate
Indo-European	Indo-Pacific	Indurate
Indo-Germanic	Indubitable	Indurative
Indo-Iranian	Inducible	Indusial
Indolent	Inductile	Indusiate

Industrial	Inebriated	Ineffectual
Industrialized	Inedited	Inefficacious
Industrious	Ineducable	Inefficient
Indwelling	Ineffable	Inelaborate
Inebriant	Ineffaceable	Inelastic
Inebriate	Ineffective	Inelegant

Ineligible	Ineradicable	Inescapable
Ineloquent	Inerasable	Inessential
Ineluctable	Inerrable	Inessive
Inenarrable	Inerrant	Inestimable
Inequable	Inert	Inevitable
Inequitable	Inertial	Inexcusable

Inexistent	Inexpiable	Inexpugnable
Inexorable	Inexplainable	Inexpungible
Inexpedient	Inexplicable	Inextensible
Inexpensive	Inexplicit	Inextinguishable
Inexperienced	Inexpressible	Inextirpable
Inexpert	Inexpressive	Inextricable

Infallible	Infatuated	Infecund
Infamous	Infeasible	Infelicitous
Infanticidal	Infect	Infelt
Infantile	Infected	Inferable
Infantine	Infectious	Inferential
Infatuate	Infective	Inferior

Infernal	Infinitive	Inflationary
Inferrible	Inflamed	Inflationism
Infertile	Inflammable	Inflected
Infiltrative	Inflammatory	Inflectional
Infinite	Inflatable	Inflectionless
Infinitival	Inflated	Inflective

Inflexed	Inflorescent	Informatory
Inflexible	Inflowing	Infracostal
Inflexional	Influential	Infrahuman
Inflexionless	Informal	Inframaxillary
Inflictive	Informational	Infrangible
In-Flight	Informative	Infrequent

Infundibular	Infusible	Ingenuous
Infundibuliform	Infusive	Ingested
Infuriate	Infusorial	Ingestible
Infuriated	Infusorian	Ingestive
Infuriating	Ingenerate	Inglorious
Infuscate	Ingenious	Ingrained

Ingravescent	Inhalant	Inherited
Ingressive	Inhaling	Inheriting
Ingrowing	Inharmonic	Inhibited
Inguinal	Inharmonious	Inhibitory
Inhabitable	Inherent	Inhomogeneous
Inhabited	Inheritable	In-House

Inhumane	Initiated	Injured
Inhumed	Initiative	Injurious
Inimical	Initiatory	Inlying
Iniquitous	Injectable	Inner
Initial	Injudicious	Inner-Directed
Initiate	Injunctive	Innermost

Innocent	Innumerable	Inodorous
Innocuous	Innumerate	Inoffensive
Innominate	Innutritious	Inofficious
Innovative	Inobservant	Inoperative
Innovatory	Inoculable	Inopportune
Innoxious	Inoculative	Inorganic

Inotropic	Inquisitive	Insatiate
Inpouring	Inquisitorial	Inscribable
Inquiline	Inrushing	Inscribed
Inquilinous	Insalubrious	Inscriptional
Inquiring	Insanitary	Inscriptive
Inquisitional	Insatiable	Inscrutable

Insectivorous	Inserted	Insides
Insecure	Insertional	Insidious
Inseminated	In-Service	Insightful
Insensible	Insessorial	Insignificant
Insensitive	Inseverable	Insincere
Insertable	Inside-Out	Insinuating

Insinuative	Insolvable	Inspective
Insipid	Insolvent	Inspectorial
Insipient	Insomniac	Inspirable
Insistent	Insomnious	Inspirational
Insociable	Insouciant	Inspirative
Insolent	Inspectional	Inspiratory

Inspired	Instigative	Institutionary
Inspiring	Instinct	Institutive
Inspiriting	Instinctive	Instructed
Instable	Instinctual	Instructional
Instant	Institutional	Instructive
Instantaneous	Institutionalized	Instrumental

Instrumentalist	Insultable	Insurable
Insubordinate	Insulted	Insured
Insubstantial	Insulting	Insurgent
Insufferable	Insuperable	Insurmountable
Insufficient	Insupportable	Insurrection
Insular	Insuppressible	Insurrectional

Insurrectionary	Integrate	Intelligential
Insusceptible	Integrated	Intelligible
Intangible	Integrative	Intemerate
Integrable	Integumentary	Intemperate
Integral	Intellective	Intended
Integrant	Intellectual	Intensified

Intensifying	Interactionist	Intercalary
Intensional	Interactive	Intercalative
Intensive	Interatomic	Intercellular
Intentional	Interbank	Interceptive
Intentioned	Interbedded	Intercessional
Inter	Interbred	Intercessorial

Interchangeable	Intercommunal	Intercrural
Intercity	Intercommunicable	Intercurrent
Interclavicular	Intercommunity	Interdenominational
Intercollegiate	Interconnected	Interdental
Intercolonial	Intercontinental	Interdepartmental
Intercolumnar	Intercostal	Interdependent

Interdictory	Interfaith	Interfertile
Interdigital	Interfascicular	Interfluent
Interdisciplinary	Interfemoral	Interfrontal
Interested	Interferential	Intergalactic
Interesting	Interfering	Interglacial
Interfacial	Interferometric	Intergovernmental

Interim	Interlaced	Interlocking
Interior	Interlacing	Interlocutory
Interior-Sprung	Interlaminar	Interludial
Interjaculatory	Interlinear	Interlunar
Interjectional	Interlinking	Intermaxillary
Interjectural	Interlobular	Intermediary

Intermediate	Intermittent	Internecine
Intermediatory	Intermolecular	Interneural
Intermetallic	Intermundane	Internodal
Interminable	Internal	Internuncial
Intermingled	Internationalist	Interoceanic
Intermissive	Internationalistic	Interoceptive

Interocular	Interpenetrant	Interpolable
Interorbital	Interpenetrative	Interpolar
Interosseous	Interpersonal	Interpolative
Interparietal	Interpetiolar	Interpretable
Interpellant	Interplanetary	Interpretative
Interpenetrable	Interpleural	Interpreted

Interpretive	Interrelated	Interscapular
Interprovincial	Interrogable	Interscholastic
Interproximal	Interrogative	Intersectional
Interracial	Interrogatory	Interseptal
Interradial	Interrupted	Intersexual
Interred	Interruptive	Intersidereal

Interspatial	Interstitial	Intertwined
Interspecific	Intersubjective	Interunion
Interspinal	Intertentacular	Interurban
Interspinous	Interterritorial	Intervenient
Interstadial	Intertribal	Intervening
Interstellar	Intertropical	Interventionist

Intervocalic	Intimate	Intoed
Interwoven	Intime	Intolerable
Interwrought	Intimidated	Intolerant
Interzonal	Intimidatory	Intoned
Intestate	Intimist	Intown
Intestinal	Intimiste	Intoxicant

Intoxicated	Intramundane	Intravenous
Intoxicating	Intramuscular	Intrepid
Intracardiac	Intranational	Intricate
Intracellular	Intransigent	Intriguing
Intractable	Intrastate	Intrinsical
Intradermal	Intravascular	Introducible

Introductory	Introspective	Intrusive
Introjected	Introversive	Intuitional
Intromissive	Introvert	Intuitionist
Intromittent	Introverted	Intuitive
Introrse	Introvertive	Intumescent
Introspectionist	Intruding	Intussusceptive

Inundant	Invaluable	Invented
Inundated	Invariable	Inventible
Inurbane	Invariant	Inventive
Invaginate	Invasive	Inventorial
Invalid	Invective	Inverse
Invalidating	Inventable	Inversive

Inverted	Inviable	Invisible
Invested	Invidious	Invitation
Investigative	Invigorated	Invitatory
Investigatory	Invigorating	Invited
Investitive	Inviolable	Inviting
Inveterate	Inviolate	Invocatory
Involucral	Involucrate	Involuntary
Involutional	Involved	Invulnerable

92 Adjectives Starting With IO, IP, IR

Iodic	iodine pentoxide
Iodized	Treated or impregnated with iodine.
Iodometric	the volumetric determination of iodine usually by titration with a standard solution of sodium thiosulfate using starch as indicator
Iodous	relating to or containing iodine and especially iodine with a valence of three
Ionian	A member of an ancient Hellenic people inhabiting Attica, parts of western Asia Minor, and the Aegean islands in preclassical and classical times. They also colonized the islands that became known as the Ionian Islands.Relating to the Ionians, Ionia, or the Ionian Islands.
Ionic	Relating to, composed of, or using ions.Relating to or denoting a classical order of architecture characterized by a column with scroll shapes (volutes) on either side of the capital.The Ionic order of architecture.The ancient Greek dialect used in Ionia.
Ionized	Convert (an atom, molecule, or substance) into an ion or ions, typically by removing one or more electrons.
Ionospheric	the part of the earth’s atmosphere in which ionization of atmospheric gases affects the propagation of radio waves, which extends from about 30 miles (50 kilometers) to the exosphere, and which is contiguous with the upper portion of the mesosphere and the thermosphere
Ipsilateral	Belonging to or occurring on the same side of the body.
Iracund	easily provoked to anger
Iranian	Relating to Iran or its people.A native or inhabitant of Iran, or a person of Iranian descent.
Iraqi	Relating to Iraq, its people, or their language.A native or inhabitant of Iraq, or a person of Iraqi descent.The form of Arabic spoken in Iraq.
Irascible	Having or showing a tendency to be easily angered.
Irate	Feeling or characterized by great anger.
Irenic	Aiming or aimed at peace.A part of Christian theology concerned with reconciling different denominations and sects.
Iridescent	having or exhibiting iridescence
Iridic	of or relating to the iris of the eye
Irish	Relating to Ireland, its people, or the Celtic language traditionally and historically spoken there.as plural noun the Irish
Irksome	Irritating; annoying.
Iron	A tool or implement now or originally made of iron.A handheld implement with a flat steel base that is heated (typically with electricity) to smooth clothes, sheets, etc.A golf club with a metal head (typically with a numeral indicating the degree to which the head is angled in order to loft the ball)Smooth (clothes, sheets, etc.) with an iron.
Ironclad	Covered or protected with iron.A 19th-century warship with armor plating.
Ironed	A tool or implement now or originally made of iron.A handheld implement with a flat steel base that is heated (typically with electricity) to smooth clothes, sheets, etc.A golf club with a metal head (typically with a numeral indicating the degree to which the head is angled in order to loft the ball)Smooth (clothes, sheets, etc.) with an iron.
Ironfisted	being both harsh and ruthless
Iron-Gray	A dark gray color.
Iron-Grey	(More fully “grey cast iron”) cast iron that has a grey fracture and contains most of its carbon in the form of flakes of graphite.
Iron-Hearted	Extremely hard-hearted; unfeeling, pitiless; cruel.
Ironic	Using or characterized by irony.
Ironical	relating to, containing, or constituting irony
Iron-Sick	Of a wooden ship, or the wood of such a ship
Irony	The expression of one’s meaning by using language that normally signifies the opposite, typically for humorous or emphatic effect.Of or like iron.
Iroquoian	A language family of eastern North America, including the languages of the Five Nations, Tuscarora, Huron, Wyandot, and Cherokee. With the exception of Cherokee, all its members are extinct or nearly so.Relating to the Iroquois people or the Iroquoian language family.
Iroquois	A member of a former confederacy of six North American peoples (Mohawk, Oneida, Seneca, Onondaga, Cayuga, and Tuscarora) who lived mainly in southern Ontario and Quebec and northern New York State.Any of the Iroquoian languages spoken by the Iroquois.Relating to the Iroquois or their languages.
Irradiant	Shining brightly.
Irradiative	to affect or treat by radiant energy (such as heat)
Irrational	not rational
Irrationalist	a system emphasizing intuition, instinct, feeling, or faith rather than reason or holding that the universe is governed by irrational forces
Irrationalistic	a system emphasizing intuition, instinct, feeling, or faith rather than reason or holding that the universe is governed by irrational forces
Irrebuttable	impossible to rebut
Irreclaimable	Not able to be reclaimed or reformed.
Irreconcilable	(of ideas, facts, or statements) representing findings or points of view that are so different from each other that they cannot be made compatible.Any of two or more ideas, facts, or statements that cannot be made compatible.
Irrecoverable	Not able to be recovered, regained, or remedied.
Irrecusable	(of evidence or a statement) not able to be challenged or rejected.
Irredeemable	Not able to be saved, improved, or corrected.(of paper currency) for which the issuing authority does not undertake to pay coin.
Irredentist	A person advocating the restoration to their country of any territory formerly belonging to it.
Irreducible	Not able to be reduced or simplified.
Irreformable	(chiefly of religious dogma) unable to be revised or altered.
Irrefragable	Not able to be refuted or disproved; indisputable.
Irrefrangible	irrefragablesense 2
Irrefutable	Impossible to deny or disprove.
Irregular	Not even or balanced in shape or arrangement.Contrary to the rules or to that which is normal or established.Grammar A member of an irregular military force.mainly North American
Irrelative	not relative:
Irrelevant	not relevant
Irrelievable	impossible to relieve
Irreligious	Indifferent or hostile to religion, or having no religious beliefs.
Irremeable	offering no possibility of return
Irremediable	Impossible to cure or put right.
Irremissible	(of a crime) unpardonable.(of an obligation or duty) binding.
Irremovable	Incapable of being removed.
Irreparable	(of an injury or loss) impossible to rectify or repair.
Irrepealable	not repealable
Irreplaceable	Impossible to replace if lost or damaged.
Irreplevisable	irrepleviable
Irrepressible	Not able to be controlled or restrained.
Irreproachable	Beyond criticism; faultless.
Irreproducible	not reproducible
Irresistible	Too attractive and tempting to be resisted.
Irresoluble	having or admitting of no solution or explanation
Irresolute	uncertain how to act or proceed
Irresolvable	(of a problem or dilemma) impossible to solve or settle.
Irrespective	Not taking (something) into account; regardless of.
Irrespirable	unfit for breathing
Irresponsible	(of a person, attitude, or action) not showing a proper sense of responsibility.
Irresponsive	Not responsive to someone or something.
Irretentive	lacking ability to retain something
Irretrievable	Not able to be retrieved or put right.
Irreverent	lacking proper respect or seriousness
Irreversible	Not able to be undone or altered.
Irrevocable	Not able to be changed, reversed, or recovered; final.
Irrigable	suitable for irrigation
Irrigational	of or relating to irrigation
Irrigative	irrigational
Irriguous	irrigated, moistened
Irritable	Having or showing a tendency to be easily annoyed or made angry.
Irritant	A substance that causes slight inflammation or other discomfort to the body.A thing that is continually annoying or distracting.Causing slight inflammation or other discomfort to the body.
Irritated	Showing or feeling slight anger; annoyed.
Irritating	Causing annoyance, impatience, or mild anger.Causing irritation to a body part.
Irritative	serving to excite
Irruptive	tending to irrupt

Ireful	Iridaceous	Iritic
Irrepleviable

98 Words That Start With IS, IT, IV Adjectives

Isagogic	a scholarly introduction to a branch of study or research
Ischaemic	deficient supply of blood to a body part (such as the heart or brain) that is due to obstruction of the inflow of arterial blood
Ischemic	deficient supply of blood to a body part (such as the heart or brain) that is due to obstruction of the inflow of arterial blood
Ischiadic	ischial
Isentropic	Having equal entropy.
Ish	To some extent.An issue of magazine, journal, etc.Used as a euphemism for “shit”
Ishmaelitish	a descendant of Ishmael
Isiac	of or relating to Isis of the cult of Isis
Isidorian	of, relating to, or characteristic of Isidore of Seville
Islamic	Relating to Islam.
Isobaric	of or relating to an isobar
Isobilateral	bilateral with the corresponding opposite parts alike
Isochoric	a line representing the variation of pressure with temperature when the volume of the substance operated on is constant
Isochromatic	Of a single color.
Isochronal	uniform in time
Isochronous	Occurring at the same time.
Isoclinal	Denoting a fold of strata so acute that the two limbs are parallel.
Isocratic	(of a chromatographic method) involving a mobile phase whose composition is kept constant and uniform.
Isocyclic	having or being a ring composed of atoms of only one element
Isodiametric	(of a cell, spore, etc.) roughly spherical or polyhedral.
Isodimorphous	isomorphism between the two forms of two dimorphous substances (as iron sulfide and cobalt arsenide) in such a way that each form of one is isomorphous with a form of the other
Isodynamic	Indicating or connecting points on the earth’s surface at which the intensity of the magnetic force is the same.
Isoelectric	Having or involving no net electric charge or difference in electrical potential.
Isoelectronic	Having the same numbers of electrons or the same electronic structure.
Isogamous	having or involving isogametes — compare heterogamous
Isogamy	Sexual reproduction by the fusion of similar gametes.
Isogenous	having the same origin
Isogeothermal	an imaginary line or curved surface beneath the earth’s surface through points having the same mean temperature
Isogeothermic	an imaginary line or curved surface beneath the earth’s surface through points having the same mean temperature
Isoglossal	a boundary line between places or regions that differ in a particular linguistic feature
Isogonal	Indicating or connecting points of the earth’s surface at which the magnetic declination is the same.
Isogonic	Indicating or connecting points of the earth’s surface at which the magnetic declination is the same.
Isohyetal	a line on a map or chart connecting areas of equal rainfall
Isolable	capable of being isolated
Isolate	with objectwith objectA person or thing that has been or become isolated.Biology
Isolated	Far away from other places, buildings, or people; remote.
Isolating	to set apart from others
Isolationism	A policy of remaining apart from the affairs or interests of other groups, especially the political affairs of other countries.
Isolationist	A person favoring a policy of remaining apart from the affairs or interests of other groups, especially the political affairs of other countries.Favoring a policy of remaining apart from the affairs or interests of other groups.
Isolative	occurring in isolation
Isolecithal	having the yolk small in amount and nearly uniformly distributed — compare centrolecithal, telolecithal
Isologous	relating to or being any of two or more compounds of related structure that differ in some way other than the number of methylene groups they contain
Isomagnetic	of, relating to, or marked by points of equal magnetic intensity or points of equal value of a component of such intensity
Isomeric	of, relating to, or exhibiting isomerism
Isomerous	exhibiting isomerism
Isometric	of, relating to, or characterized by equality of measure
Isomorphic	Corresponding or similar in form and relations.
Isomorphous	isomorphicsense 1a
Isoperimetrical	of, relating to, or having equal perimeters
Isopod	A crustacean of the order Isopoda, such as a wood louse.
Isopodan	a large order of small sessil-eyed malacostracan crustaceans (division Peracarida) that lack a carapace, that have a body usually depressed with seven free thoracic segments each bearing a pair of similar legs, and that occur in marine, freshwater, or terrestrial habitats or as parasites on invertebrates and fish — compare tanaidacea
Isorhythmic	(of a composition or part) in which the rhythm is often repeated but the pitch of the notes is varied each time.
Isosceles	having two equal sides — see triangle illustration
Isoseismal	Relating to or denoting lines on a map connecting places where an earthquake was experienced with equal strength.
Isoseismic	isoseismal
Isostatic	general equilibrium in the earth’s crust maintained by a yielding flow of rock material beneath the surface under gravitative stress
Isostemonous	having stamens equal in number to the perianth divisions
Isosteric	one of two or more substances (as carbon monoxide and molecular nitrogen) that exhibit similarity of some properties as a result of having the same number of total or valence electrons in the same arrangement and that consist of different atoms and not necessarily the same number of atoms
Isotactic	(of a polymer) in which all the repeating units have the same stereochemical configuration.
Isotheral	of, relating to, or marked by the same mean summer temperature
Isothermal	Involving or possessing a constant temperature.A line connecting points having the same temperature; an isotherm.
Isotonic	Physiology Physiology
Isotopic	Relating to an isotope or isotopes of an element.
Isotropic	exhibiting properties (such as velocity of light transmission) with the same values when measured along axes in all directions
Isotropous	isotropic
Israeli	Relating to the modern country of Israel.A native or inhabitant of Israel, or a person of Israeli descent.
Issuable	open to contest, debate, or litigation
Issuant	(of the upper part of an animal) shown rising up or out from another bearing, especially from the bottom of a chief or from behind a fess.
Issueless	a vital or unsettled matter
Isthmian	Relating to an isthmus.
Italian	Relating to Italy, its people, or their language.A native or inhabitant of Italy, or a person of Italian descent.The Romance language of Italy, descended from Latin. It is also one of the official languages of Switzerland.
Italianate	Italian in character or appearance.
Italic	Of the sloping kind of typeface used especially for emphasis or distinction and in foreign words.An italic typeface or letter.Relating to or denoting the branch of Indo-European languages that includes Latin, Oscan, Umbrian, and the Romance languages.The Italic group of languages.
Itchier	Having or causing an itch.
Itchiest	Having or causing an itch.
Itching	An uncomfortable sensation on the skin that causes a desire to scratch.Be the site of or cause an itch.
Itchy	Having or causing an itch.
Iterant	marked by repetition, reiteration, or recurrence
Iterative	involving repetition
Ithaca	An island off the western coast of Greece in the Ionian Sea, the legendary home of Odysseus.An academic city in central New York, at the southern end of Cayuga Lake, home to Cornell University and Ithaca College; population 29,763 (est. 2008).
Ithyphallic	(especially of a statue of a deity or other carved figure) having an erect penis.
Itinerant	Traveling from place to place.A person who travels from place to place.
Itinerary	A planned route or journey.
Itty-Bitty	Very small; tiny.
Ivied	Covered in ivy.
Ivory-Towered	divorced from reality and practical matters

Isobathic	Isochasmic	Isocheimal
Isocheimenal	Isocheimic	Isochimal
Isodimorphic	Isometrical	Isonomic
Isonomous	Isopodous	Israelitish

Conclusion

When it comes to adjectives, there are few that can top the letter I. Intense, incredible, and important are just a few of the many adjectives that start with I. No matter what you’re trying to describe, there’s an I adjective that can help you get your point across. So the next time you’re looking for the perfect way to describe something, don’t forget to look to the letter I.