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Jyutping hei2 jan1
Pinyin qǐ yīn

Definitions (CC-CEDICT)
  1. cause
  2. a factor (leading to an effect)
Definitions (粵典–words.hk)
  1. 名詞
    某件事​發​生​嘅​原因​(​量​詞​:​個​)
    cause; origin
    • 而家仲未知道疫潮嘅起因。
      而家仲未知道疫潮嘅起因。
      ji4 gaa1 zung6 mei6 zi1 dou3 jik6 ciu4 ge3 hei2 jan1.
      We still don't know cause of the pandemic now.
Definitions (Wiktionary)
  1. noun
    cause; origin
    (syn.) 所以然, 緣故, 因致端, 成因, 來由, 根由, 因由, 张本, 肇因, 言因, 緣起, 基因, 張本, 道理, 原因, 理由, 缘起, 来由, 缘故, 緣由, 关系, 缘由, 因端, 關係
Definitions (Kaifangcidian)
  1. (沒有對應漢語詞彙)
Examples (粵典–words.hk)
  1. Cantonese
    彻底调查意外起因
    徹底調查意外起因
    cit3 dai2 diu6 caa4 ji3 ngoi6 hei2 jan1
    • to launch a thorough investigation into the cause of the accident
  2. Cantonese
    有关部门将会调派职员调查事件起因。
    有關部門將會調派職員調查事件起因。
    • The responsible department are sending people to investigate the incident.
  3. Cantonese
    而家仲未知道疫潮嘅起因。
    而家仲未知道疫潮嘅起因。
    ji4 gaa1 zung6 mei6 zi1 dou3 jik6 ciu4 ge3 hei2 jan1.
    • We still don't know cause of the pandemic now.
Examples (Wiktionary)
  1. Mandarin
    有些病况起因很明显,但治愈却很费时。
    有些病況起因很明顯,但治癒卻很費時。
    yǒu xiē bìng kuàng qǐ yīn hěn míng xiǎn , dàn zhì yù què hěn fèi shí .
    • The causes of some conditions are obvious, yet time-consuming to cure.