呕心沥血 / 嘔心瀝血

ǒu​xīn​lì​xuè

painstakingly

to work one's heart out; to exert the utmost effort, typically in intellectual or creative endeavors

他呕心沥血地完成了这部长篇小说。

idiom

created sense Mar 4, 2026, 02:25 AM