不知所云 bù zhī suǒ yún

DEFINITIONS

  1. to not know what sb is driving at
  2. to be unintelligible

CHARACTERS

不 bù
HSK 1
no, not; un-; negative prefix
知 zhī
HSK 2
know, perceive, comprehend
所 suǒ
HSK 2
place, location; numerary adjunct
云 yún
HSK 4
say, speak; clouds