不ふ純じゅん異い性せい交こう遊ゆうMeaningsNoun1. illicit sexual relationshipKanji used不negative純pure異different性nature (of a person)交mingle遊playComposed of不ふ純じゅんimpure; adulterated; foul; mixed; dishonestNa-adjective異い性せいthe opposite sex; isomerismNoun交こう遊ゆうfriendship; companionship; fraternity; comradeshipNoun