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Jyutping bui3 sing4 ze3 jat1
Pinyin bèi chéng jiè yī

Definitions (CC-CEDICT)
  1. to make a last-ditch stand before the city wall (idiom); to fight to the last ditch
  2. to put up a desperate struggle
Definitions (粵典–words.hk)
  1. 語句
    背向​城牆​,​依靠​最後一戰​、​同敵​人決​存亡​。​指決定​存亡​嘅​最​後​一​戰​。
    to fight to the last ditch; to put up a desperate struggle
Definitions (Wiktionary)
  1. phrase, idiomatic
    to fight to the last ditch; to put up a desperate struggle
    (syn.) 背城一战, 背城一戰