v.出卖,辜负;背叛;流露出;
例句:
His voice betrayed the worry he was trying to hide.
他的声音掩盖不了内心的担忧。
She was terrified of saying something that would make her betray herself (= show her feelings or who she was) .
她害怕说话时泄了自己的底。
Woe betide you if you betray us.
如果你背叛我们,你会得到报应.