Merriam-Webster Collegiate Dictionary - carp

 I. intransitive verb  Etymology: Middle English, of Scandinavian origin; akin to Icelandic karpa to dispute  Date: 14th century to find fault or complain querulously  • ~er noun  II. noun  Date: 1904 complaint  III. noun  (plural ~ or ~s)  Etymology: Middle English ~e, from Middle French, from Late Latin ~a, probably of Germanic origin; akin to Old High German karpfo ~  Date: 15th century  1. a large variable Asian soft-finned freshwater cyprinid fish (Cyprinus ~io) of sluggish waters that is often raised for food and has been widely introduced into United States waters; also any of various related cyprinid fishes (as the grass ~)  2. a fish (as the European sea bream) resembling a ~ CARP  noun combining form  Etymology: New Latin ~ium, from Greek -karpion, from karpos part of a fruit mesocarp ; fruit schizocarp