Vacillate Synonyms: dither, fluctuate, hesitate, reel Antonyms: choose, decide, determine, elect Wordlist: Bank PO, CAT, GRE, IELTS, SAT, SSC Frequency: High Frequency Content Type: Cartoon, V Vacillate Vocab Meme – daily English pictures with words to improve your vocab Vacillate [vas-uh-leyt] (verb) be undecided about something;indecisive; to oscillate or fluctuate.