betray

动词 betray:

1. reveal unintentionally
   同义词：bewray
2. deliver to an enemy by treachery
   同义词：sell
3. disappoint, prove undependable to; abandon, forsake
   同义词：fail
4. be sexually unfaithful to one's partner in marriage
   同义词：cheat on, cheat, cuckold, wander
5. give away information about somebody
   同义词：denounce, tell on, give away, rat, grass, shit, shop, snitch, stag
6. cause someone to believe an untruth
   同义词：deceive, lead astray

1. As long as you don't betray me, I'll do whatever you ask me to (do).
   只要你不出卖我，要我做什么我都愿意。
2. His accent betrayed the fact that he was foreign.
   他的口音显露出他是外国人。
3. The smoke from cooking betrayed the presence of the enemy.
   炊烟暴露了敌人的存在。
4. He betrayed his country.
   他背叛了他的国家。

be.tray

v.tr.（及物动词）
be.trayed,be.tray.ing,be.trays

To give aid or information to an enemy of; commit treason against:
背叛，出卖：给敌方提供帮助或情报；通敌叛国：
例句：
betray one`s country.
背叛祖国

To deliver into the hands of an enemy in violation of a trust or allegiance:
出卖：违背信任或忠诚地送给敌方：
例句：
betrayed Christ to the Romans.
将耶稣出卖给罗马人

To be false or disloyal to:
背信或不忠实：
例句：
betrayed their cause; betray one`s better nature.
不忠实他们的事业；背离善良本性

To divulge in a breach of confidence:
以违背信任而泄露：
例句：
betray a secret.
泄露秘密

To make known unintentionally:
无意识地暴露：
例句：
Her hollow laugh betrayed her contempt for the idea.
她的大笑显示了她对此观点的蔑视

To reveal against one`s desire or will.See Synonyms at reveal
泄露愿望，泄露欲望：泄露某人的愿望或欲望参见 reveal
To lead astray; deceive.See Synonyms at deceive
引入歧途；欺骗参见 deceive

来源：
Middle English bitrayen
中古英语 bitrayen
bi- [be-]
bi- [前缀，表.全面地，彻底地.]
trayen [to betray] from Old French trair from Latin tr3dere [to hand over] * see tradition
trayen [背叛] 源自 古法语 trair 源自 拉丁语 tr3dere [交付] *参见 tradition

【引伸】
betray.al
n.（名词）
betray.er
n.（名词）