他惊得哑口无言。用英语怎么说？

他惊得哑口无言。

The shock silenced him completely.

the

art. 指已提到的人（物），指说话人与听者已知的人（物），用于独一无二的事物前，与形容词最高级和序数词连用；

例句
He did have a real knowledge of the country...
他对该国的确知之甚多。

shock

n. 休克，震惊，震动，打击；vt. 使休克，使震惊，使震动，使受电击；vi. 感到震惊，受到震动，堆成禾束堆；adj. 浓密的，蓬乱的；

例句
I suppose the shock had addled his poor old brain.
我估摸这个打击已经把他那可怜的脑袋瓜搞糊涂了。

silenced

v. 使安静( silence的过去式和过去分词 )，使沉默，压制，（用以让人们安静）安静；

例句
Cassandra silenced him with a sharp dig in the small of the back.
卡桑德拉使劲戳了一下他的后腰，让他住嘴。

him

pron. (he的宾格)他；

例句
They said goodbye to him as he got aboard the train at Union Station.
当他在联合火车站登上火车之际，他们向他道别。

completely

adv. 完全地，完整地，完全，彻底，全部，一干二净，很，非常，充分，十分，万分；

例句
...a second career which absorbed her more completely than her acting ever had.
比演艺生涯更让她投入的又一职业