promiscuity (n.)youdaoicibaDictYouDict[promiscuity 词源字典]
1834, "indiscriminate mixture," from French promiscuité (1752), from Latin promiscuus "mixed" (see promiscuous) + French -ité (see -ity). Sexual sense is from 1844. Earlier was promiscuousness (by 1773 general; 1808 sexual).[promiscuity etymology, promiscuity origin, 英语词源]