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English Dictionary

vacillate  (ˈvæsɪˌleɪt


verb (intransitive)

  1. to fluctuate in one's opinions; be indecisive
  2. to sway from side to side physically; totter or waver

Derived Forms

ˌvacilˈlation  noun
ˈvacilˌlator  noun

Word Origin

C16: from Latin vacillāre to sway, of obscure origin


View thesaurus entry
= 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


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