- to waver in mind or opinion; be indecisive or irresolute: His tendency to vacillate makes him a poor leader.
- to sway unsteadily; waver; totter; stagger.
- to oscillate or fluctuate.
Origin of vacillate
SynonymsSee more synonyms on Thesaurus.com
Examples from the Web for vacillate
I kind of self-edit that out of the history, but they did vacillate for quite a while.David Chase on Tony Soprano’s Fate, the State of TV, and Why He Couldn’t Finish ‘True Detective’
September 4, 2014
It seems like you vacillate between 10 and 20 members at any given time.Mother Falcon the 18-Piece Indie Symphonic Rock Band Taking Texas By Storm
June 2, 2013
Van der Sloot appears to vacillate between apologetic and aloof in his response, captured on hidden camera.Natalee Holloway: Is the Bone in Aruba Hers?
Barbie Latza Nadeau
November 19, 2010
He may pause, but he must not hesitate,—and tremble, but must not vacillate.Modern Painters Volume II (of V)
Long did he vacillate whether Tom Keane should not be arrested on suspicion.Roland Cashel
Charles James Lever
They vacillate, conforming now to the interest of the wage-workers, now to the interest of the employers.Socialism
Why do you vacillate, and keep us all in the dark as to what you mean?Sandra Belloni, Complete
As if it were possible to wait now, to weigh, vacillate, hesitate!The Death of the Gods
- to fluctuate in one's opinions; be indecisive
- to sway from side to side physically; totter or waver
Word Origin and History for vacillate
1590s, "to sway unsteadily," from Latin vacillatum, from vacillare (see vacillation). Meaning "to waver between two opinions or courses" is recorded from 1620s. Related: Vacillated; vacillates; vacillating.