extramarital

形容词 extramarital:

1. characterized by adultery
   同义词：adulterous, extracurricular

1. An extramarital affair.
   一件私通的事

ex.tra.mar.i.tal

adj.（形容词）
Being in violation of marriage vows; adulterous:
私通的；通奸的：
例句：
an extramarital affair.
一件私通的事