豆とう腐ふに鎹かすがいじ字FuriganaAudioMeanings1expression, nounhaving no effect; waste of effortidiomatic expression›Idiomatic expression literally meaning 'a clamp on tofu', used to describe a futile or pointless action that produces no result.彼かれに注ちゅう意いしても豆とう腐ふに鎹かすがいだ。Break this sentence down in the analyzerWarning him is like trying to clamp tofu — it's completely useless.いくら説せっ得とくしても豆とう腐ふに鎹かすがいで、彼かれは聞きく耳みみを持もたなかった。Break this sentence down in the analyzerNo matter how much I tried to persuade him, it was a waste of effort; he wouldn't listen.