parvenu (n.)youdaoicibaDictYouDict[parvenu 词源字典]
"upstart," 1802, from French parvenu, "said of an obscure person who has made a great fortune" (Littré); noun use of past participle of parvenir "to arrive" (12c.), from Latin pervenire "to come up, arrive, attain," from per- "through" (see per (prep.)) + venire "to come" (see venue). As an adjective from 1828.[parvenu etymology, parvenu origin, 英语词源]