不知所云
bùzhī-suǒyún
incoherent; unintelligible
Every meaning
bùzhī-suǒyún
- incoherent; unintelligible
Its characters
- 不bùnot; no
- 知zhīto know
- 所suǒplace
- 云yúncloud
Words with 不
Words with 知
Meanings from our own dictionary. Chengyu from the Xinhua idiom list, the most common first.