c. 1600, "disprove, confute," from French évincer "disprove, confute," from Latin evincere "conquer, overcome subdue, vanquish, prevail over; elicit by argument, prove," from assimilated form of ex "out" (see ex-) + vincere "to overcome" (from nasalized form of PIE root *weik- (3) "to fight, conquer"). Meaning "show clearly" is late 18c. Not clearly distinguished from its doublet, evict, until 18c. Related: Evinced; evinces; evincing; evincible.
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