挖空心思
wākōng-xīnsī
to rack one's brains
Every meaning
wākōng-xīnsī
- to rack one's brains
Its characters
- 挖wāto dig; to excavate
- 空kōngempty; hollow
- 心xīnheart
- 思sīto think; to consider
Words with 挖
Words with 空
Meanings from our own dictionary. Chengyu from the Xinhua idiom list, the most common first.