破天荒

pòtiānhuāng
  1. unprecedented
  2. for the first time
  3. never before
  4. first ever

CEDICT

unprecedented; unheard-of; for the first time

Wiktionary

語出宋．孫光憲《北夢瑣言．卷四》：「唐荊州衣冠藪澤，每歲解送舉人，多不成名，號曰：『天荒解』。劉蛻舍人以荊解及第，號為『破天荒』。」形容從來沒有過的事，或第一次出現的事。

重編國語辭典

形容從來沒有發生過的事，或第一次出現的事

維基詞典

Entry Composition

1 破 pò
  1. broken
  2. damaged
  3. worn out
  4. lousy
  5. rotten
  6. to break, split or cleave
  7. to get rid of
  8. to destroy
  9. to break with
  10. to defeat
  11. to capture (a city etc)
  12. to expose the truth of
2 天 tiān
  1. day
  2. sky
  3. heaven
3 荒 huāng
  1. desolate
  2. shortage
  3. scarce
  4. out of practice
  5. absurd
  6. uncultivated
  7. to neglect

Related entries

亙古未有 gèngǔwèiyǒu
  1. unprecedented
  2. never seen since ancient times
前所未有 qiánsuǒwèiyǒu (idiom) unprecedented
前所未見 qiánsuǒwèijiàn
  1. unprecedented
  2. never seen before
這是個用這個國家前所未見的，環繞學校、教堂的無數人龍，所說出的答案。這些人苦等三、四個小時投票，許多人還是生平頭一次，因為他們相信，這次一定要不一樣，他們的聲音就是明證。

It's the answer told by lines that stretched around schools and churches, in numbers this nation has never seen. By people who waited three hours and four hours, many for the first time in their lives, because they believed that this time must be different, that their voices could be that difference.

Source: Tatoeba

前無古人 qiánwúgǔrén
  1. (idiom) unprecedented
  2. unheard of
他是一位前无古人的大科学家。

He is as great a scientist as ever lived.

Source: Tatoeba

空前 kōngqián unprecedented
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