FromOld Danishkøpæ(“buy, purchase”), fromOld Norsekaupa, past tensekeypta, fromProto-Germanic*kaupōną,*kaupijaną, cognate withGermankaufen andDutchkopen. The Germanic verb is probably a loan fromLatincaupō(“tradesman”).
købe (imperativekøb,infinitiveatkøbe,present tensekøber,past tensekøbte,perfect tenseharkøbt)