Vacillate v. t. : To move one way and the other; to reel or stagger; to waver.

Vacillate v. t. : To fluctuate in mind or opinion; to be unsteady or inconstant; to waver.

Example:
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Taxonomy
vacillate, Merriam-Webster Online Dictionary, Dictionary, webster, sway, waver, Word Games, Webster Online Dictionary with audio pronunciations, glossary, english, language, ESL, Search, intransitive verb, Inflected, Etymology, Latin, past participle.

Defination from the web:
vacillate from the Merriam-Webster Online Dictionary with audio pronunciations, thesaurus, Word of the Day, and word games. ... Learn more about "vacillate" with Google Search >> Custom Search. Learn more about "vacillate" and related topics at Britannica.com ...