Definition of vacillate: [vs•il•late]
-verb (used without object)
- to be indecisive or to waver between different options
- to sway or stagger
Example of vacillate:

When two roads diverged in a wood, Veronica vacillated. Her indecision made all the difference.
Synonyms for vacillate:
waver, hesitate, be undecided, be indecisive, be ambivalent
Antonyms for vacillate:
be decisive, deciding
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