dumbness
/ˈdʌmnəs/
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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。
