wrk one's fngers [oneslf] to the b🔗⭐🔉

wrk one's fngers [oneslf] to the bne 身を粉にして[骨身を惜しまず]働く. 《1853》

研究社新英和大辞典 ページ 175159 での【wrk one's fngers [oneslf] to the b】単語。