adj.哑的；愚蠢的；不能说话的

vt.使沉默

She's been dumb from birth. 她生来就是哑巴。

It was dumb of you to say that. 你说那种话真是太愚蠢了。

She was unfairly caricatured as a dumb blonde. 她被不公正地丑化成了一个傻头傻脑的金发女郎。

He was struck dumb by her sharp question. 他被她那尖锐的问题弄得哑口无言。

We were struck dumb with horror and grief. 惊恐和忧伤使我们哑口无言。

dumb作“哑的”解时无比较等级。