不聞不問

不闻不问
bùwénbùwèn
  1. not to hear, not to question (idiom)
  2. to show no interest in sth
  3. uncritical
  4. not in the least concerned

CEDICT

to not bother to ask or to listen; to show no interest in; to be indifferent to

Wiktionary

置身事外，漠不關心。《兒女英雄傳．緣起首回》：「除了選色徵歌之外，一概付之不聞不問。」也作「不問不聞」。

重編國語辭典

置身事外，漠不關心

維基詞典

Entry Composition

1 不 bù
  1. no; not so
  2. (bound form) not; un-
2 聞 wén
  1. to hear
  2. news
  3. well-known
  4. famous
  5. reputation
  6. fame
  7. to smell
  8. to sniff at
3 不問 bùwèn
  1. to pay no attention to
  2. to disregard
  3. to ignore
  4. to let go unpunished
  5. to let off

Related entries

滿不在乎 mǎnbùzàihu
  1. not in the least concerned (idiom)
  2. reckless
  3. couldn't give a damn about it
  4. unperturbed
  5. couldn't care less
  6. harum scarum