a stupid person; fool; ignoramus; 笨人
stupid; 愚笨
clumsy of speech; 嘴笨
He is clumsy with his hands. 他的一双手很笨。
heavy and awkward; 粗笨
The furniture is too cumbersome to move. 家具太笨,搬起来很不方便。
牛津高阶第八版
美国韦氏词典
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维基百科 (自由的百科全书)