隐忍不发 yǐn rěn bù fā

DEFINITIONS

  1. to keep one's emotions inside oneself
  2. to restrain one's emotions

CHARACTERS

隐 yǐn hide, conceal; hidden, secret
忍 rěn endure, bear, suffer; forbear
不 bù no, not; un-; negative prefix
发 fā issue, dispatch, send out; hair