Synonyms/Hypernyms (Ordered by Estimated Frequency) of verb vacillate

2 senses of vacillate

Sense 1
hover, vibrate, vacillate, oscillate -- (be undecided about something; waver between conflicting positions or courses of action; "He oscillates between accepting the new position and retirement")
       => hesitate, waver, waffle -- (pause or hold back in uncertainty or unwillingness; "Authorities hesitate to quote exact figures")

Sense 2
fluctuate, vacillate, waver -- (move or sway in a rising and falling or wavelike pattern; "the line on the monitor vacillated")
       => swing -- (alternate dramatically between high and low values; "his mood swings"; "the market is swinging up and down")