(1)行う理由
(2)駆り立てる
(3)誘因となる
(4)serve as the inciting cause of
(5)cause to act
さらに詳しく
(1)（騒動や不和を）計画的・意図的に引き起こすこと
(2)deliberate and intentional triggering (of trouble or discord)
(4)urge on; cause to act; "The other children egged the boy on, but he did not want to throw the stone through the window"
