sparrow (n.)youdaoicibaDictYouDict[sparrow 词源字典]
small brownish-gray bird (Passer domesticus), Old English spearwa, from Proto-Germanic *sparwan (cognates: Old Norse spörr, Old High German sparo, German Sperling, Gothic sparwa), from PIE *spor-wo-, from root *sper- (3), forming names of small birds (cognates: Cornish frau "crow;" Old Prussian spurglis "sparrow;" Greek spergoulos "small field bird," psar "starling"). In use, with qualifying words, of many small, sparrow-like birds. Sparrowfarts (1886) was Cheshire slang for "very early morning."[sparrow etymology, sparrow origin, 英语词源]