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type of freshwater fish, late 14c., from Old French carpe "carp" (13c.) and directly from Vulgar Latin carpa (source also of Italian carpa, Spanish carpa), from a Germanic source (cf. Middle Dutch carpe, Dutch karper, Old High German karpfo, German Karpfen "carp"); possibly the immediate source is Gothic *karpa. A Danube fish (hence the proposed East Germanic origin of its name), introduced in English ponds 14c. Lithuanian karpis, Russian karp are Germanic loan words.
"complain," early 13c., originally "to talk," from Old Norse karpa "to brag," of unknown origin; meaning turned toward "find fault with" (late 14c.), probably by influence of Latin carpere "to slander, revile," literally "to pluck" (see harvest (n.)). Related: Carped; carping.