expression, godan verb (-ku)
take great pains; make every effort; rack one's brains
Emphasizes mental effort and worry directed toward a task or problem; often implies sustained, anxious striving.
彼は問題の解決に心を砕いている。
He is racking his brains over the solution to the problem.
母はいつも家族の健康に心を砕いている。
My mother always takes great pains over the family's health.
expression, godan verb (-ku)
Focuses on the emotional state of being worried or concerned about someone or something, rather than the effort itself.
彼女は子供の将来に心を砕いている。
She is worried about her child's future.