Word Detail

苦心
kǔ xīn
painstaking effort, to take a lot of trouble, laborious at pains
HSK 7-9 (v3.0)

Examples

一番苦心。
Yìfān kǔxīn.
A lot of trouble / Painstaking effort.
苦心经营。
Kǔxīn jīngyíng.
Manage with painstaking effort.