plumage

From Late Middle English plumage, plummage (“bird’s feathers collectively, plumage; (falconry) feathers fed to a hawk to cause it to regurgitate, casting”), from Middle French plumage, plomage (“bird’s feathers collectively; person’s (showy) clothing”), from Old French plumage (“bird’s feathers collectively”) (modern French plumage), from plume (“feather, plume”) + -age (suffix forming nouns denoting a state of being). Plume is derived from Latin plūma (“feather, plume”), ultimately from Proto-Indo-European *plewk- (“to flow; to fly; to run; etc.”), from Proto-Indo-European *plew- (“to flow; to fly; to run”).

出典: Wiktionary「plumage」（CC BY-SA 4.0）