dumb
单词辨析：
指因生理缺陷而不会说话的，许多人认为该词具有冒犯性，最好以speech-impaired 代替；也指因震惊、愤怒等而说不出话的。
He's deaf and dumb and so rarely communicates with others.
他又聋又哑，很少与他人交流。
The official was struck dumb by a reporter's sharp question.
这位官员被一名记者尖锐的问题弄得哑口无言。
指不会说话的，也指不说话或拒绝说话的。
Can a mute person have friends?
不会说话的人能交到朋友吗？
She stood there, mute and defiant.
她站在那儿不说话，一副挑衅的样子。
相关例句：
I can't believe you really sang! Dumb ass!
不能相信你真的唱了！笨蛋！
He has been dumb from birth.
他生来就哑。
Thinking how dumb the old man and I were.
笑我和老头是多么愚蠢。
He's deaf and dumb.
他又聋又哑。
The questions were set up to make her look dumb.
问题这么设计，就是为了让她出丑。
No one knew of these transactions, nor was he going to mention them to anyone else. He was like the dumb man eating the bitter herb; he had to suffer in silence.
这件事谁也不知道，他又不能对任何人提起，真是哑巴吃黄连，有苦说不出。