こころをくだく

心を砕く

表記・読み：こころをくだく

1. 1

   to take great pains; to make every effort; to rack one's brains

   expressions (phrases, clauses, etc.)五段動詞（く）idiomatic expression
2. 2

   to be concerned; to worry

   expressions (phrases, clauses, etc.)五段動詞（く）idiomatic expression