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Vacillate in a Sentence: Meaning, Examples & Practice

    A cartoon child stands between two paths holding one foot over each, showing vacillate in a sentence as wavering between choices.

    Vacillate means to keep changing your mind, and it almost always names the two things a person wavers between. To use vacillate in a sentence, give it a choice: “The board vacillated between two sites for months.” The verb is intransitive, so it never takes a decision as a direct object.

    Vacillate at a glance

    • Vacillate is an intransitive verb meaning to waver between choices; its forms are vacillates, vacillated and vacillating.
    • It is almost always followed by between, over or about, never by a direct object.
    • The noun is vacillation and the adjective is vacillating.
    • It belongs to formal writing and sounds heavier than the everyday word dither.
    • The commonest error is confusing vacillate with oscillate, which describes a steady physical swing.

    What does vacillate mean?

    Vacillate is a verb meaning to keep changing your mind, or more rarely to sway unsteadily. The Cambridge entry for vacillate keeps the mental sense to the front, and that is the one every modern sentence uses. Where a writer means a single pause before deciding, hesitate for a moment is the lighter and more accurate verb.

    Sense Plain meaning Example sentence
    Waver between choices Keep changing one’s mind over time She vacillated between the two job offers.
    Sway unsteadily Move to and fro in a literary or physical image The flame vacillated in the draught.

    One limitation is worth stating. Vacillate implies repeated change over a period, so a single moment of doubt is hesitation, not vacillation. The word also carries a faint note of disapproval: a person who vacillates is usually being criticised for failing to commit.

    How do you use vacillate in a sentence?

    Vacillate is intransitive, so it takes no direct object, and the thing being weighed follows between, over or about. The five patterns below cover a decision, a policy and a personal choice.

    Pattern Example What it signals
    vacillate between A and B She vacillated between the two offers. The canonical pattern; both options are named.
    vacillate over + noun The minister vacillated over the policy. Names the matter under debate.
    vacillate about + noun He vacillated about moving abroad. Slightly more conversational, still formal.
    vacillate for + time They vacillated for weeks. Makes the duration of the indecision clear.
    be vacillating The committee is still vacillating. Progressive form; the wavering continues.

    Two neighbours clarify the choice. To waver in support is to lose a little confidence, often just once, while vacillate means going back and forth repeatedly. To dither over a choice is the informal equivalent, and it adds a note of fussy helplessness.

    A cartoon child holds two picture cards apart on a balance beam, showing that vacillate names both options.
    The verb names what is being weighed, one option on each side.

    Vacillate in a sentence: examples across contexts

    The verb keeps its formal tone wherever it appears, but the subject changes who is being judged. The nine sentences below move from a school project to a diplomatic report.

    Context Example sentence Why this works
    Classroom The group vacillated between two themes for the project. A low-stakes choice, both options named.
    Workplace email We have vacillated over the launch date for too long. The first person plural admits the delay.
    News report The minister vacillated over the reform, first backing then opposing it. The contrast of backing and opposing shows the swing.
    Editorial A leader who vacillates between two positions earns neither. General truth, present tense, critical tone.
    Academic prose Voters who vacillate between parties are often the decisive group. Neutral description of a political pattern.
    Literature essay The heroine vacillates between duty and desire throughout the novel. The literary sense of an inner conflict.
    Conversation Stop vacillating and pick a restaurant. The word lands hard but stays formal.
    Business report Investors dislike firms that vacillate about strategy. Abstract subject, formal register.
    Diplomatic writing The delegation vacillated for weeks before signing. Duration plus a momentous decision.

    The informal alternative dither would lower the tone in every one of these rows, which is why the formal reports keep vacillate. Only the conversation line allows the sharper, almost scolding use of the word.

    Vacillate vs oscillate

    Vacillate and oscillate both describe going back and forth, but they belong to different worlds. Vacillate is a person changing their mind; oscillate between two speeds is a regular, physical swing that a machine or a value performs.

    Attribute vacillate oscillate
    Core meaning Keep changing one’s mind Move steadily to and fro
    Typical subject A person, a committee, a government A needle, a value, a wave
    Pattern Regular and often unsteady Regular and often measurable
    Register Formal, slightly critical Technical or literary
    Implies a fault Yes, indecision is criticised No, the movement is neutral

    Verdict: choose vacillate for a mind that cannot settle and oscillate for anything that swings on a regular path. A needle oscillates, and a voter vacillates; only one of the two is a judgement about character.

    Word forms and grammar of vacillate

    Vacillate inflects regularly and gives a noun and an adjective that are both common in formal writing. The table also sets it beside equivocate about the rules, which means to speak ambiguously rather than to keep changing your mind.

    Form Part of speech Example
    vacillate verb, base form Do not vacillate once the plan is agreed.
    vacillates verb, third person singular She vacillates whenever the cost rises.
    vacillated verb, past and past participle He vacillated for a whole year.
    vacillating verb, present participle; adjective A vacillating committee delays every decision.
    vacillation noun His vacillation cost the team weeks.
    equivocate verb — different word Politicians often equivocate about tax.

    Keep the noun and verb apart. Vacillation is the state, while to vacillate is the act, and the adjective vacillating describes a person or group rather than a single moment. The separate page on vacillating covers that adjectival use in more detail.

    Common mistakes with vacillate

    • Incorrect: The manager vacillated the plan. Correct: The manager vacillated over the plan. Rule: Vacillate is intransitive and takes no direct object.
    • Incorrect: She vacillated to accept the job. Correct: She vacillated about accepting the job. Rule: Use between, over or about, never to plus an infinitive.
    • Incorrect: The needle vacillated between the two poles. Correct: The needle oscillated between the two poles. Rule: Oscillate is physical; vacillate is mental.
    • Incorrect: He vacillated once and then decided. Correct: He hesitated once and then decided. Rule: Vacillate implies repeated wavering over time.
    • Incorrect: They vacillate between to stay or to leave. Correct: They vacillate between staying and leaving. Rule: Between takes parallel forms, not two infinitives joined by or.

    Practice using vacillate

    Work through the six items, then check the reasoning, not only the answer.

    1. Fill the gap: The council ______ between the two designs for most of the meeting.
    2. Choose the better word: The pressure gauge (vacillated / oscillated) between fifteen and twenty.
    3. Correct the error: She vacillated the offer for a week.
    4. Build a sentence: use vacillate between about a student choosing a course.
    5. Spot the register: which belongs in an editorial — the party vacillated over the bill, or the party kept going back and forth, like, a lot?
    6. Rewrite with the noun: He kept changing his mind and lost the vote. Use vacillation.

    Answers

    1. vacillated — the verb is intransitive and between names both options.
    2. oscillated — a gauge makes a regular physical swing, not a mental choice.
    3. She vacillated over the offer for a week — the verb needs over, not a direct object.
    4. Model answer: The student vacillated between law and medicine for a term.
    5. The party vacillated over the bill — the other version is far too casual.
    6. His vacillation cost him the vote — the noun replaces the repeated change of mind.
    A single cartoon scene contrasts a child torn between two cards with a metronome swinging evenly on a shelf.
    Vacillate belongs to the mind, while oscillate describes a regular physical swing.

    The bottom line

    Use vacillate in a sentence when someone repeatedly changes their mind, and name the two options after between or the matter after over. The two points that decide most sentences are these: the verb is intransitive, so it never takes a direct object, and it implies a pattern of wavering rather than a single pause. Where the wavering is physical and regular, oscillate is the right verb instead.

    Frequently asked questions about vacillate

    Does vacillate always need two options?

    Not always, but the clearest sentences give two. The pattern vacillate between A and B names both alternatives and leaves no doubt. You can also write vacillate over the policy or vacillate about moving, where the matter is named instead. A sentence with no focus at all tends to sound vague.

    What is the noun form of vacillate?

    The noun is vacillation, as in his vacillation cost the team weeks. It names the state of repeatedly changing one’s mind and is common in formal writing about politics, management and character. The adjective vacillating describes a person or group, as in a vacillating committee.

    Is vacillate the same as hesitate?

    No. Hesitate is a brief pause before acting, and it can be entirely sensible. Vacillate is repeated wavering over time between alternatives, and it usually carries criticism. A driver who hesitates at a junction is being careful; a committee that vacillates for months is being indecisive.

    Is vacillate a formal word?

    Vacillate belongs to formal and literary writing, where it suits reports, editorials and character studies. In everyday speech most people say dither or keep changing their mind. Using vacillate in a casual text can sound pompous, which is the main reason learners meet it in print far more than in conversation.


    Have you ever found yourself uncertain and wavering between two choices? This feeling of indecision is what we refer to as vacillating. When someone vacillates, they struggle to make a firm decision and often go back and forth between different options.

    Vacillating can happen in various situations, from choosing a restaurant for dinner to making significant life choices. It reflects a sense of hesitation and ambivalence that can leave one feeling stuck or conflicted. By understanding why we vacillate and learning strategies to overcome indecision, we can navigate decision-making processes more effectively and confidently.

    7 Examples Of Vacillate Used In a Sentence For Kids

    1. I vacillate between choosing chocolate and vanilla ice cream.
    2. Sometimes I vacillate between playing with toys and reading a book.
    3. My cat likes to vacillate between sleeping in the sun and playing with yarn.
    4. I often vacillate between wearing my blue shoes or my red shoes.
    5. The leaves on the tree vacillate in the wind.
    6. I vacillate between eating an apple and a banana for snack.
    7. The pendulum on the clock will vacillate back and forth.

    14 Sentences with Vacillate Examples

    • Vacillate between attending classes and staying home to study.
    • It’s normal to vacillate between joining multiple clubs or focusing on academics.
    • Many students vacillate between choosing a major based on passion or job prospects.
    • It’s common for college students to vacillate between going out for social events or staying in to relax.
    • Some students vacillate between taking on part-time jobs for extra income or focusing solely on studies.
    • With so many options, it’s easy to vacillate between choosing which courses to enroll in each semester.
    • College students often vacillate between following trends in fashion or sticking to their own unique style.
    • Some students vacillate between spending time with friends or dedicating more time to personal growth.
    • It’s not uncommon for students to vacillate between prioritizing mental health or meeting academic deadlines.
    • Many students vacillate between attending lectures on campus or tuning in to online classes from home.
    • Some students vacillate between participating in sports events or focusing on building their career.
    • It’s important not to vacillate when it comes to making decisions about internships or research opportunities.
    • College students often vacillate between using online resources or traditional textbooks for studying.
    • Amidst all the choices, it’s easy to vacillate between maintaining a healthy diet or indulging in campus fast food options.

    How To Use Vacillate in Sentences?

    To use the word Vacillate correctly in a sentence, follow these simple steps:

    1. Understand the meaning: Vacillate means to sway indecisively between different opinions or actions; to waver.
    2. Choose your subject: Begin by selecting the subject of your sentence, which is the person or thing that is doing the Vacillating.
    3. Add the verb: The main word you want to focus on is Vacillate, so make sure to use it as the action in your sentence.
    4. Provide context: To make the sentence more meaningful, add context around why the subject is vacillating. For example, “Jack vacillated between ordering pizza and getting sushi for dinner.”
    5. Check for correctness: Ensure that the sentence makes sense and accurately conveys the meaning of Vacillate.
    6. Practice: Try constructing different sentences using Vacillate to get more comfortable with its usage.

    Remember, using Vacillate in a sentence is about capturing the essence of indecisiveness or wavering. By following these steps and practicing, you will be able to incorporate Vacillate effectively in your writing and communication.

    Conclusion

    In conclusion, vacillate means to waver indecisively between different options or opinions. This term conveys the idea of uncertainty or hesitation in making a choice. For example, “She vacillated between studying for the test or going to the party.” It suggests a struggle in reaching a final decision, often characterized by back-and-forth pondering or hesitation. By understanding the concept of vacillating, one can recognize the common human experience of being torn between conflicting options and the challenge of making a definitive choice.

    Written & edited by

    Founder & Editor, StartsWithy

    Robin founded StartsWithy in 2022 to make English words easier to understand and use. Robin oversees our 30,000+ guides, checks meanings and grammar against trusted dictionaries such as Cambridge, Oxford Learner’s and Collins, and is accountable for every correction we make.