Английский Этимологический словарь - rage (n.)

- 13c., from O.Fr. raige, from M.L. rabia, from L. rabies "madness, rage, fury," related to rabere "be mad, rave." Related to rabies, of which this is the original sense. The Welsh (cynddaredd) and Breton (kounnar) words for "rage, fury" originally meant "hydrophobia" and are compounds based on the word for "dog" (Welsh ci, plural cwn; Breton ki). The verb is c.1250, originally "to play, romp;" meaning "be furious" first recorded early 14c. The rage "fashion, vogue" dates from 1785.