From Longman Dictionary of Contemporary Englishvanquishvan‧quish /ˈvæŋkwɪʃ/ verb [transitive] literary BEAT/DEFEATto defeat someone or something completely→ See Verb table
Examples from the Corpus
vanquish• But this was not a night for Lewis to look down upon the vanquished.• This spirit often turned the victors into the vanquished.• She wouldn't be as easy to vanquish as she had been outside the Feelgood Saloon.• The narco manages to stay alive, elude capture, get his drugs across the border, and vanquish authorities.• Victor and vanquished, he was beginning to think, came together in art and were one and the same.• The City was close to surrender when, after five weeks, government troops vanquished the rebels around Aylesbeare.Origin vanquish (1300-1400) Old French venquis, past tense of veintre “to defeat”, from Latin vincere; → VICTOR 