プログレッシブ和英中辞典(第4版)の解説
ゆういん【誘因】
〔動機〕a motive；〔原因〕a cause
何が誘因となって彼はあの行動に走ったのか
What was the motive for his action?／What induced [caused] him to act in such a way?
教師の軽率な言葉が学生の反抗の誘因となった
The teacher's careless words triggered [brought about/led to] the students' rebellion.