心照不宣 xīn zhào bù xuān

DEFINITIONS

  1. a tacit mutual understanding

CHARACTERS

心 xīn
HSK 3
heart; mind, intelligence; soul
照 zhào
HSK 3
shine, illumine, reflect
不 bù
HSK 1
no, not; un-; negative prefix
宣 xuān
HSK 5
declare, announce, proclaim