vt.

1. 背叛；出卖；对……不忠[（+to）]
   That man is capable of betraying his friends.

   那家伙会出卖朋友。

2. 泄漏，透露
   He would suffer death rather than betray the secret.

   他宁死也不肯泄露机密。

3. （无意中）暴露，显示[（+to）][+wh-]
   Her red face betrayed her nervousness.

   她涨红的脸显示她很紧张。

4. 把……引入歧途

v.

1. act treacherously towards (one's country) by aiding the enemy.
   ▸be disloyal to or inform on.
2. unintentionally reveal; be evidence of:
   she drew a deep breath that betrayed her indignation.