vanquish /ˈveɪ̯ŋkwɪʃ/ verb1 •To defeat (someone); to overcome.In single Combat thou shalt buckle vvith me; / And if thou vanquishest, thy vvords are true, / Othervvise I renounce all confidence. — 1597 formsvanquished · vanquisht · vanquishing · vanquishes · vanquisheth · vanquishest