諱莫如深 huì mò rú shēn

DEFINITIONS

  1. important matter that must be kept secret (idiom); don't breathe a word of it to anyone!

CHARACTERS

諱 huì conceal; shun; regard as taboo
莫 mò
HSK 6
do not, is not, can not; negative
如 rú
HSK 3
if, supposing; as if; like, as
深 shēn
HSK 4
deep; depth; far; very, extreme