史無前例

史无前例
shǐwúqiánlì
(idiom) unprecedented in history

CEDICT

Entry Composition

1 史 shǐ
  1. history
  2. annals
  3. title of an official historian in ancient China
2 無 wú
  1. not to have
  2. no
  3. none
  4. not
  5. to lack
  6. un-
  7. -less
3 前例 qiánlì precedent