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 verb-·lat·ed, -·lat·ing
- to sway to and fro; waver; totter; stagger
- to fluctuate or oscillate
- to waver in mind; show indecision
Origin of vacillatefrom 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 w?-, 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").