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"prevail" is also used as a crossword clue. If that's what you saw, the answer is often win (3 letters).
Definitions
use persuasion successfully
Word origin
From Middle English prevailen, from Old French prevaler, from Latin praevaleō (“be very able or more able, be superior, prevail”), from prae (“before”) + valeō (“be able or powerful”). Displaced native Old English rīcsian.
Used in a sentence
“Red colour prevails in the Canadian flag.”
“Sunny skies will prevail across the Northeast.”
“And it came to pass, when Moses held up his hand, that Israel prevailed; and when he let down his hand, Amalek prevailed.”
Source: Wiktionary, CC BY-SA 4.0
Used as a crossword answer1 curated clues
01“Win out”7 letters
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