vanquish v. + Add to list US //ˈvæŋkwɪʃ// UK //vˈænkwɪʃ// van·quish SynonymsEtymology Synonyms beatcrushshe'lltrounceOriginLATvincō→OFRveincre→MEvenquysshen→ENvanquish From Middle English venquysshen, vaynquisshen, borrowed from a conjugated form of Old French veincre, from Latin vincō.