kǔ​xīn​gū​yì

to work with painstaking care

苦心孤诣 苦心孤詣 kǔ​xīn​gū​yì
to work with painstaking care
to make extreme efforts to achieve something; specifically to study or work hard to reach a level of excellence that others cannot match
to manage with difficulty
to manage or plan something with painstaking care and great difficulty

Frequency

Movie subtitles
0.030 per million appears in 0% of films
Written text
0.141 per million

Sources