苦心孤诣 / 苦心孤詣

kǔ​xīn​gū​yì

painstaking effort

to reach a unique level of excellence or achievement through long-term, dedicated, and meticulous work

他苦心孤诣地钻研了数十年，终于在这一领域取得了巨大成就。

idiom

created sense Mar 4, 2026, 02:25 AM