promiscuity
n.
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).
〔蒋〕[misc混合，混杂，-ity名词后缀] 混杂(性)，杂乱