dumbness

/ˈdʌmnəs/ 5
Dumbness is a noun that means the quality of being mentally slow or limited, or having a poor ability to understand or profit from experience.

noun [抽象名词]无言,沉默

His dumbness means that he isn't interest in this kind of things. 他的沉默表明他对这种事情不感兴趣。

dumbness

-ness ⌜ 表示状态或质量的性质 - indicating the state or quality of ~ ⌟