どんConjugationsTop 30000MeaningsNa-adjectiveNoun1. dull; slow; stupid; dull-brainedOther spellings鈍どん43%Other readings鈍のろのろKanji in other spellings鈍dullPitch accentどんUsed in vocabulary鈍どん角かく三さん角かく形けいobtuse triangleNoun