1、In particular, the dumbness would appear to be aggravated by stress.
特別是，壓力會讓沉默變得更為嚴重。

2、His dumbness means that he isn't interest in this kind of things.
他的沉默表明他對這種事情不感興趣。

3、I was momentarily dumbstruck by the profound dumbness of this question.
這個極度愚蠢的問題，立刻讓我語塞。

dumbness翻譯