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 Ars Video Red Bull spent the second half of last year vacillating over whether to allow Perez to finish out the year. ArsTechnica, 26 Mar. 2025 Veneno, ever the anti-hero and unreliable narrator, vacillates between her self-serving and diabolical impulses throughout the arc of her character. Samantha Riedel, Them., 28 Mar. 2025 Trump vacillated about federal funding for the Kennedy Center during his first administration, variously defending and criticizing federal funding for it. Brady Knox, Washington Examiner - Political News and Conservative Analysis About Congress, the President, and the Federal Government, 8 Feb. 2025 Trump tapped Musk to lead DOGE, but the administration’s description of Musk’s role has also vacillated between heading DOGE and working as a senior adviser with no DOGE authority, depending on the context of the situation. Ashley Oliver, Washington Examiner - Political News and Conservative Analysis About Congress, the President, and the Federal Government, 8 Mar. 2025 See All Example Sentences for vacillate
Recent Examples of Synonyms for vacillate
Verb
  • Understanding why companies hesitate, and knowing how to work around it, gives you an edge.
    Dr. Diane Hamilton, Forbes.com, 27 Apr. 2025
  • Tickets are going fast for this panel, so don’t hesitate to secure your spot.
    Lorraine Berry, Los Angeles Times, 26 Apr. 2025
Verb
  • Musk’s comments about his time allotment come just hours after a group of eight Democratic state treasurers wrote to the chair of Tesla’s board about the company’s faltering performance.
    Miranda Nazzaro, The Hill, 22 Apr. 2025
  • The Business Drama: Volatility, Strategy, and Turnaround What followed was a decade of operational rework—sometimes faltering, sometimes brilliant.
    Kate Hardcastle, Forbes.com, 21 Apr. 2025

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Cite this Entry

“Vacillate.” Merriam-Webster.com Thesaurus, Merriam-Webster, https://www.merriam-webster.com/thesaurus/vacillate. Accessed 3 May. 2025.

More from Merriam-Webster on vacillate

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