verb (used without object), vac·il·lat·ed, vac·il·lat·ing.
Origin of vacillate
Examples from the Web for vacillator
The youth has within him both a Hamlet and a Saint-Just, both a vacillator and a zealot.Romain Rolland|Stefan Zweig
Anything to arouse this personator of our human mutability, this vacillator between doing and letting alone!
British Dictionary definitions for vacillator
Word Origin for vacillate
Word Origin and History for vacillator
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.