不知所之 bù zhī suǒ zhī

DEFINITIONS

  1. whereabouts unknown

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
之 zhī
HSK 4
marks preceding phrase as modifier of following phrase; it, him her, them; go to