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Jyutping gwaan1 fo2
Pinyin guān huǒ

Definitions (Wiktionary)
  1. verb
    to take off the heat; to turn down the heat; to turn off the burner
Examples (Tatoeba—Mandarin-English)
  1. Mandarin
    永远不要忘记关火。
    永遠不要忘記關火。
    yǒng yuǎn bù yào wàng jì guān huǒ 。
    • Never forget to put out the fire.
  2. Mandarin
    南希告诉了我有关火灾的事。
    南希告訴了我有關火災的事。
    nán xī gào sù le wǒ yǒu guān huǒ zāi de shì 。
    • Nancy told me about the fire.
Examples (Wiktionary)
  1. Mandarin
    关火用余热保温
    關火用餘熱保溫
    guān huǒ yòng yú rè bǎo wēn
    • (cooking) to turn off the burner and keep it warm using the remaining heat