stab in the back片语动词

背叛、背后捅刀、出卖可拆开

He stabbed his closest colleague in the back to get the promotion.

他为了升职，背后捅了最要好的同事一刀。

背叛、背后中伤

Her sudden resignation felt like a stab in the back.

她突然辞职，让人感觉像是一种背叛。