とうふかすがい 豆腐に鎹 LinksSentence search for 豆腐に鎹Sentence search for とうふにかすがいSentence search for 豆腐にかすがいKanji details for 豆, 腐 and 鎹Edit in JMdict Expressions (phrases, clauses, etc.), Noun1. having no effect; waste of effortIdiomatic expressionOther forms豆腐にかすがい 【とうふにかすがい】 Discussions Log in to talk about this word.