betray
/bɪˈtreɪ/verb
with obj.
1- be disloyal to对…不忠, 辜负：
the men who have betrayed British people's trust.
这些辜负了英国人民信任的人。
1.1
- be disloyal to (one's country, organization, or ideology) by acting in the interests of an enemy背叛（自己的国家、组织或思想）：
he could betray his friends for the sake of money.
他可以为了钱出卖朋友。
1.2
- treacherously inform an enemy of the existence or location of (a person or organization)出卖, 针对…告密：
this group was betrayed by an informer.
这个集团被告密者出卖了。
1.3
- treacherously reveal (secrets or information)泄露（机密, 信息）：
many of those employed by diplomats betrayed secrets and sold ciphers.
外交官们雇佣的人当中有很多都向外泄露机密、出卖密码。
1.4
- figurative reveal the presence of; be evidence of〈喻〉显露, 暴露; 证明：
she drew a deep breath that betrayed her indignation.
她深深地吸了一口气, 这说明她很愤怒。
派生词
betrayal
nounbetrayer
noun词源
Middle English: from BE- 'thoroughly' + obsolete tray 'betray', from Old French trair, based on Latin tradere 'hand over'.