ㄌㄨˇㄉㄨㄣˋdùn

  1. 遲鈍愚笨晉書··皇甫謐》:卜鄰魯鈍!」鹵鈍」。遲鈍伶俐靈敏機警俊敏聰明聰穎穎悟

stupid, slow on the uptake
obtus, bouché, stupide
Muff (S)​, debil (Adj)​