분골쇄신이 · 분골쇄신을
doing one's utmost, working oneself to the bone
Example
앞으로 회사의 발전을 위해 분골쇄신하겠습니다.
From now on, I will give everything I have for the company's growth.
Word parts
분 powder+골 bone+쇄 crush+신 body
Literally 'grinding bones to powder and crushing the body'.
Good to know
A set phrase in formal pledges and speeches, like a new employee's or an official's vow.
Related words