勞
心
苦
思
勞
心
苦
思
Definitions4 characters one's brains/to
Usage•••frequent
Pronunciations
勞
心
苦
思
As word
1to rack one's brains/to think hard
2to rack one's brains/to think hard
3to rack one's brains/to think hard
4to rack one's brains/to think hard
