Vacillate
verb /ˈvæs.ɪ.leɪt/ — To waver between different opinions or actions.
Definition
To waver back and forth between different opinions, choices, or courses of action; to be indecisive or inconsistent in behavior.
Beyond the definition
Vacillate is the word for the person who can't quite land. They want to — but the other option keeps pulling. To vacillate is to live in the gap between choosing and not choosing, which is its own kind of exhausting. The word has a back-and-forth quality even in how it sounds.
Origin & history
From Latin vacillare ('to sway, to waver'), root connected to the idea of swinging or oscillating. Related to the image of something tipping one way, then the other.
Example sentences
Illustrative sentences for learning, not verified community posts or sourced quotations.
She vacillated for weeks before finally accepting the job offer.
His tendency to vacillate made it difficult to plan anything around him.
How to use it
This entry uses a verb. Follow the examples for tense and any objects or prepositions it needs.
Choose “Vacillate” when the meaning fits your context: To waver back and forth between different opinions, choices, or courses of action; to be indecisive or inconsistent in behavior.
Synonyms
waver, hesitate, dither, fluctuate, oscillate
Antonyms
decide, commit, resolve, persist
Related words
- waver
- dither
- equivocate
- hesitate
Vacillate vs waver
Waver suggests physical or emotional unsteadiness — a flame guttering, a voice faltering, a resolve that might give out. Vacillate is more specifically about going back and forth between options: the vacillating person is caught between two choices, unable to commit to either. You waver under pressure; you vacillate between possibilities. Waver implies you might fall; vacillate implies you're oscillating. Both suggest indecision, but vacillate has a back-and-forth mechanical quality that waver lacks.
Compare this word
Word in the Wild
See how this word appears in life, language and stories.
Illustrative sentences and imagined stories for learning — not verified sightings, interviews, or sourced quotations.
Fictional scene
Wavering between two different paths
Two people are caught in a deep debate at a crossroads, pointing toward two very different directions without making a choice.
Their inability to settle on a single path demonstrates the act of vacillating. The scene captures the tension of being indecisive, showing how the mind can waver back and forth between different options without reaching a firm resolution.
Image credit: Wordspun · AI-generated conceptual illustration
Questions about this word
What does "Vacillate" mean?
Vacillate is verb meaning: To waver between different opinions or actions.. To waver back and forth between different opinions, choices, or courses of action; to be indecisive or inconsistent in behavior.
Where does the word "Vacillate" come from?
From Latin vacillare ('to sway, to waver'), root connected to the idea of swinging or oscillating. Related to the image of something tipping one way, then the other.