只字不提

隻字不提
zhīzìbùtí
(idiom) to say not a single word about it

CEDICT

not say a single word (about something)

Wiktionary

一个字也没提起。

重編國語辭典

一个字也不谈起。比喻有意不说。

維基詞典

Entry Composition

=1 只 zhī variant of 只 zhī
=1 只 zhī grain that has begun to ripen
=1 只 zhī classifier for birds and certain animals, one of a pair, some utensils, vessels etc
2 字 zì
  1. letter
  2. symbol
  3. character
  4. word
  5. courtesy or style name traditionally given to males aged 20 in dynastic China

classifier: 個
3 不提 bùtí to not mention