art nouveauyoudaoicibaDictYouDict[art nouveau 词源字典]
first recorded 1901, French, literally "new art" (see novel (adj.)). Called in German Jugendstil.[art nouveau etymology, art nouveau origin, 英语词源]
nouveau richeyoudaoicibaDictYouDict
1813, French, literally "new rich." Opposite noveau pauvre is attested from 1965. Ancient Greek had the same idea in neo-ploutos "newly become rich."