noun, noun or participle which takes 'suru'
working oneself to the point of physical ruin; crushing oneself through overwork
Describes extreme overwork or struggle that damages one's health or body. Often used in formal or literary contexts to emphasize self-sacrifice or excessive effort.
彼は砕身の努力でプロジェクトを成功させたが、体を壊してしまった。
He made the project succeed through crushing effort, but ruined his health.
砕身して働くことは美徳とは言えない。
Working oneself to the point of physical ruin cannot be called a virtue.