Definition
to compel someone or something to alter their trajectory
逼迫…改變方向
We need to find a way to head them off before they reach their destination.
我們需要找到方法在他們到達目的地之前阻止他們。
The police set up a roadblock at the intersection to head the suspect off.
警方在十字路口設置路障以攔截嫌犯。
He tried to change the subject to head her off from discussing the issue.
他試圖改變話題，阻止她討論這個問題。