expression, Godan verb

Idiomatic expression.
  1. to take great pains, to make every effort, to rack one's brains.
  2. to be concerned, to worry.

Variations

Pronunciation Kanji Kana Is Common
 
 
心を砕く こころをくだく

Contained Kanji Breakdown

heart, mind, spirit
こころ シン (2nd, N4)
smash, break, crush
くだ.く サイ (9th, N1)
stone
いし セキ シャク (1st, N3)
left hand, cliff(厂) variant
mouth
くち コウ ク (1st, N4)
soldier, private, die
ソツ シュツ そっ.する (Kentei 1)
nine
キュウ ク ここの (1st, N5)
ten
ジュウ ジッ ジュッ (1st, N5)