peachy (adj.)youdaoicibaDictYouDict[peachy 词源字典]
1590s, "resembling a peach" in some way, from peach (n.) + -y (2). Slang sense of "attractive" attested by 1900. Extended form peachy-keen recorded from 1953. Related: Peachiness.[peachy etymology, peachy origin, 英语词源]