神不知鬼不覺 shén bù zhī guǐ bù jué

DEFINITIONS

  1. top secret
  2. hush-hush

CHARACTERS

神 shén
HSK 5
spirit, god, supernatural being
不 bù
HSK 1
no, not; un-; negative prefix
知 zhī
HSK 2
know, perceive, comprehend
鬼 guǐ
HSK 5
ghost; spirit of dead; devil
不 bù
HSK 1
no, not; un-; negative prefix
覺 jué to wake up from sleep; conscious