betray(动词):背叛;出卖;辜负(对他人的信任、友谊、国家或原则);也可指泄露(秘密、情绪或真实意图),或在无意间暴露(某种特征/状态)。
/ bɪˈtreɪ /
He would never betray his friends.
他绝不会背叛朋友。
Her trembling voice betrayed how nervous she really was, even though she tried to sound calm.
尽管她努力让自己听起来镇定,但颤抖的声音还是泄露了她其实很紧张。
来自古法语 betrair(“背叛、出卖”),进一步追溯到拉丁语 tradere(“交出、移交”),由 **trans-**(“跨越、穿过”)+ dare(“给”)构成。词义从“把人交出去”逐渐发展为“出卖/背叛(信任或立场)”,也引申出“暴露、泄露(真相或情绪)”的用法。