Synonym Chooser

How does the verb vacillate differ from other similar words?

Some common synonyms of vacillate are falter, hesitate, and waver. While all these words mean "to show irresolution or uncertainty," vacillate implies prolonged hesitation from inability to reach a firm decision.

vacillated until events were out of control

When is it sensible to use falter instead of vacillate?

While the synonyms falter and vacillate are close in meaning, falter implies a wavering or stumbling and often connotes nervousness, lack of courage, or outright fear.

never once faltered during her testimony

When would hesitate be a good substitute for vacillate?

The words hesitate and vacillate are synonyms, but do differ in nuance. Specifically, hesitate implies a pause before deciding or acting or choosing.

hesitated before answering the question

When could waver be used to replace vacillate?

Although the words waver and vacillate have much in common, waver implies hesitation after seeming to decide and so connotes weakness or a retreat.

wavered in his support of the rebels

Example Sentences

Examples are automatically compiled from online sources to show current usage. Read More Opinions expressed in the examples do not represent those of Merriam-Webster or its editors. Send us feedback.
Recent Examples of vacillate Similarly, Kiki vacillates between a broad figure of oblivious privilege, not that far removed from Moore’s The Big Lebowski heiress, and a scrapper who feels just as insecure in this place as either sister. Alan Sepinwall, Rolling Stone, 22 May 2025 Triunfo Canyon’s vacillating clime offers warm, direct sun on these south-facing-slope vines by day and cool breezes trapped from the coast by night. Stephanie Breijo, Los Angeles Times, 19 May 2025 And the instability caused by the administration’s vacillating trade policy is radiating throughout the local logistics network. Kate Nishimura, Sourcing Journal, 13 May 2025 In typical New England fashion, the sky vacillated from a blanket of gray to light blue. Laura Tillman, Hartford Courant, 5 May 2025 See All Example Sentences for vacillate
Recent Examples of Synonyms for vacillate
Verb
  • House Minority Leader Hakeem Jeffries (D-NY) hesitated to affirm his support for Schumer’s continued leadership.
    W. James Antle III, The Washington Examiner, 13 June 2025
  • As good as the night was against an A’s team that has now lost 22 of 26 games, Soriano hesitated to call it his best.
    Doug Padilla, Oc Register, 11 June 2025
Verb
  • Ocean protection efforts are faltering, with policy talk far outpacing tangible results.
    Felicia Jackson, Forbes.com, 10 June 2025
  • Doctoring provides powerful tools for getting under the hood, but writing offers ones that dig into the interstitial spaces where our more utilitarian tools falter.
    Danielle Ofri, New Yorker, 7 June 2025

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Cite this Entry

“Vacillate.” Merriam-Webster.com Thesaurus, Merriam-Webster, https://www.merriam-webster.com/thesaurus/vacillate. Accessed 20 Jun. 2025.

More from Merriam-Webster on vacillate

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