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 Here are signs leadership has slipped into chaos: No clear priorities: Leaders who view all issues as urgent communicate constantly vacillating expectations, creating massive confusion. Kathy Miller Perkins, Forbes.com, 22 Apr. 2025 On Ransom Canyon, Minka Kelly's Quinn vacillates between feelings for wealthy rancher and town bigwig, Davis Collins (Eoin Macken), and longtime crush, salt-of-the-earth rancher, Staten Kirkland (Josh Duhamel). Maureen Lee Lenker, EW.com, 18 Apr. 2025 Val, which premiered at Cannes Film Festival, is a genuinely surprising and strange movie that vacillates between emotional extremes at an almost minute-by-minute pace. Rachel Handler, Vulture, 2 Apr. 2025 Yes, but: The bird flu outbreak has vacillated in the last three years and could quickly spike again. Axios, 28 Mar. 2025 See All Example Sentences for vacillate
Recent Examples of Synonyms for vacillate
Verb
  • Marsch didn’t hesitate to call on the 21-year-old to replace Davies in March.
    Joshua Kloke, New York Times, 21 May 2025
  • Don’t hesitate to make the most of this energy by planning a fun night out with friends or a romantic evening with your crush.
    Valerie Mesa, People.com, 20 May 2025
Verb
  • If trade negotiations falter, these tariffs could take effect, potentially igniting a trade war and unsettling global markets.
    Trefis Team, Forbes.com, 28 May 2025
  • But after a flagrant foul by Clark against Reese on Saturday, all the prior talk from each athlete about a lack of a rivalry seemed to falter.
    Ryan Morik, FOXNews.com, 28 May 2025

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Cite this Entry

“Vacillate.” Merriam-Webster.com Thesaurus, Merriam-Webster, https://www.merriam-webster.com/thesaurus/vacillate. Accessed 4 Jun. 2025.

More from Merriam-Webster on vacillate

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