An example of vacillate is when you pick black tiles, then white tiles, then blue tiles, then black tiles and can't make up your mind.
intransitive verbvacillated, vacillating
- to sway to and fro; waver; totter; stagger
- to fluctuate or oscillate
- to waver in mind; show indecision
Origin of vacillate; from Classical Latin vacillatus, past participle of vacillare, to sway to and fro, waver ; from Indo-European an unverified form wek-, to be bent, probably ; from base an unverified form wā-, to bend apart, turn from source Classical Latin varus, bent, diverse
intransitive verbvac·il·lat·ed, vac·il·lat·ing, vac·il·lates
- To be unable to choose between different courses of action or opinions; waver: She vacillated about whether to leave.
- To change between one state and another; fluctuate: The weather vacillated between sunny and rainy.
- Archaic To sway from one side to the other.
Origin of vacillateLatin vacillāre, vacillāt-, to waver.
(third-person singular simple present vacillates, present participle vacillating, simple past and past participle vacillated)
From Latin vacillÄtum, supine form of vacillÅ (“sway, waver").