体を粉にする
からだをこにする
karadawokonisuru
JMdict entry #1409180
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expressions (phrases, clauses, etc.)suru verb - included
idiomatic expression
to work assiduously; to give one's all; to make the utmost effort; to make (grind) one's body into dust
see: 身を粉にする・みをこにする