passer-by (n.)youdaoicibaDictYouDict[passer-by 词源字典]
also passerby, 1560s, from agent noun of pass (v.) + by; earlier, this sense was in passager (see passenger).[passer-by etymology, passer-by origin, 英语词源]
passerine (adj.)youdaoicibaDictYouDict
1776, from Latin passerinus "of a sparrow," from passer "sparrow," possibly of imitative origin. The noun is 1842, from the adjective.
passeriformyoudaoicibaDictYouDict
"Resembling a sparrow in form or structure; specifically of or relating to the order Passeriformes of perching birds", Late 19th cent.; earliest use found in The Century Dictionary. From classical Latin passer sparrow + -iform, after scientific Latin Passeriformes, order name.