とう
豆
ふ
腐
　
に
かすがい
鎹

expression, noun

Idiomatic expression.
  1. having no effect, waste of effort.

Variations

Pronunciation Kanji Kana Is Common
とう
豆
ふ
腐
　
に
かすがい
鎹
 豆腐に鎹 とうふにかすがい
とう
豆
ふ
腐
　
に
　
か
　
す
　
が
　
い
 豆腐にかすがい とうふにかすがい

Contained Kanji Breakdown

beans, pea, midget
まめ　トウ　ズ (3rd, N1)
delicious, (旨 variant)
one, one radical (no.1)
イチ　いっ　ひと- (1st, N5)
mouth
くち　コウ　ク (1st, N4)
grass, straw, herbs
to divide
rot, decay, sour
くさ.る　フ (Early Jr. High, N1)
borough, urban prefecture, govt office
フ　い　う (4th, N2)
dotted cliff radical (no. 53)
ゲン (Kentei 1)
wild goose, trailing cliff radical (no. 27)
カン　かりがね (Kentei 1)
adhere, attach, refer to
つ.ける　フ　-づけ (4th, N3)
human radical (no. 9)
measurement, tenth of a shaku, a little
スン　す　みき (6th, N1)
meat
ニク　しし (2nd, N4)
inside, within, between
ナイ　うち　ダイ (2nd, N3)
upside-down box radical (no. 13)
キョウ　ケイ (Kentei 1)
person
ひと　ニン　ジン (1st, N5)
clamp, (kokuji)
かすがい (Kentei 1)
gold
キン　きむ　かね (1st, N5)
whole, entire, all
ゼン　すべ.て　まった.く (3rd, N3)
person
ひと　ニン　ジン (1st, N5)
king, rule, magnate
オウ　-ノウ　おお (1st, N3)
to divide
escort, send
おく.る　ソウ (3rd, N4)
walk, road, (辵 variant, one dot jōyō form)
しんにょう
frontier pass, close, relation
heavens, sky, imperial
テン　あま-　あも (1st, N5)
one, one radical (no.1)
イチ　いっ　ひと- (1st, N5)
large, big
ダイ　おお-　た (1st, N5)