waver, hesitate, dither (mainly British), haver, sway, falter, be doubtful, fluctuate, be uncertain, be unsure, teeter, oscillate, be undecided, chop and change, seesaw, blow hot and cold (informal), temporize, hum and haw, be unable to decide, keep changing your mind, shillyshally (informal), be irresolute or indecisive, swither (Scottish), be unable to make up your mind (mainly British), dillydally
Word usage trends for “vacillate”
View usage over:
Train like a Scrabble champion
Allan Simmons' 5 tips on learning words.
Join our newsletter
All the latest wordy news, linguistic insights, offers and competitions every month.