Where does “不純異性交遊” come from?

不純異性交遊 (Japanese) comes from Japanese 異性 — the opposite sex the other gender to which one is referring.

不純異性交遊 (Japanese): an illicit sexual relationship

Definitions

  1. an illicit sexual relationship

Ancestry of “不純異性交遊”, step by step

StepLanguageWordMeaning
1Japanese異性the opposite sex the other gender to which one is referring
Every word from Japanese 異性 →
不純異性交遊 — Etymology, Origin & Word History | Etymology Explorer