只字不提 zhī zì bù tí

DEFINITIONS

  1. not to mention (idiom); to say not one word
  2. fig. to omit mention (of a non-person or embarrassing topic)
  3. to censor

CHARACTERS

只 zhī only, just, simply
字 zì letter, character, word
不 bù no, not; un-; negative prefix
提 tí hold in hand; lift in hand