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Jyutping ngou4 bing1
Pinyin áo bīng

Definitions (Wiktionary)
  1. verb, literary
    to fight a bloody battle
Examples (Wiktionary)
  1. Mandarin
    于时西楚霸王,剑及繁阳。鏖兵金匮,校战玉堂。 [Classical Chinese, simp.]From: Yu Xin, c. 578, The Lament for the South (《哀江南赋》)Yúshí Xīchǔ Bàwáng, jiànjí Fányáng. Áobīng jīnguì, jiàozhàn yùtáng. [Pinyin]
    于时西楚霸王,剑及繁阳。鏖兵金匮,校战玉堂。 [Classical Chinese, simp.]From: Yu Xin, c. 578, The Lament for the South (《哀江南賦》)Yúshí Xīchǔ Bàwáng, jiànjí Fányáng. Áobīng jīnguì, jiàozhàn yùtáng. [Pinyin]
    hen ce the martial strongman
    • pointed his sword at Fanyang on the scroll.
      He waged the bloody war
      from the innermost of his palace hall.