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Jyutping bui3 joek3
Pinyin bèi yuē

Definitions (CC-CEDICT)
  1. to break an agreement
  2. to go back on one's word
  3. to fail to keep one's promise
Definitions (Wiktionary)
  1. verb, intransitive, literary, verb-object
    to violate an oath or agreement
    (syn.) 反阄, 反鬮
Definitions (Kaifangcidian)
  1. (沒有對應漢語詞彙)
Examples (Wiktionary)
  1. Mandarin
    背约
    背約
    bèi yuē
    • to break one’s promise