C13: from Old French conquerre, from Vulgar Latin conquērere (unattested) to obtain, from Latin conquīrere to search for, collect, from quaerere to seek
Word Origin and History for conquer
v.
c.1200, cunquearen, from Old French conquerre "conquer, defeat, vanquish," from Vulgar Latin *conquaerere (for Latin conquirere) "to search for, procure by effort, win," from Latin com-, intensive prefix (see com-), + quaerere "to seek, gain" (see query (v.)). Related: Conquered; conquering.