Copenhagen
来自Big Physics
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wiktionary
From Low German Kopenhagen, a calque (perhaps modified by folk etymology) of Danish København.
etymonline
Copenhagen
capital of Denmark, Danish København, literally "merchant's port," from Danish køber "merchant," literally "buyer" (see cheap (adj.)), + havn "port" (see haven). English picked up cope 15c.-17c. from Low German in the sense of "to buy, barter, make a bargain," but it has become obsolete.