n. the quality of aiding an enemy
n. 背叛, 辜负
[法] 背叛, 通敌, 背信
1. The betrayal of his best friend hurt him deeply.
他最好的朋友的背叛深深伤害了他。
2. She felt a sense of betrayal when she discovered the truth.
当她发现真相时，感到了一种被背叛的感觉。
3. Trust is hard to regain after a betrayal.
在背叛之后，重建信任是很难的。