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Jyutping sam1 fo2
Pinyin xīn huǒ

Definitions (CC-CANTO)
  1. symptoms of which include mental uneasiness
Definitions (Wiktionary)
  1. noun, Chinese, traditional
    internal heat, symptoms of which include mental uneasiness, thirst, rapid pulse, etc.
  2. noun
    hidden anger or annoyance; pent-up fury or worries
Definitions (Kaifangcidian)
  1. (沒有對應漢語詞彙)
Examples (粵典–words.hk)
  1. Cantonese
    呢排风高物燥,要小心火烛。
    呢排風高物燥,要小心火燭。
    lei1 paai2 fung1 gou1 mat6 cou3, jiu3 siu2 sam1 fo2 zuk1.
    • It's dry and windy these days. Be careful with fire.
  2. Cantonese
    小心火烛,提防盗贼!
    小心火燭,提防盜賊!
    siu2 sam1 fo2 zuk1, tai4 fong4 dou6 caak6!
    • Beware of fire and thieves!
  3. Cantonese
    佢呢排心火盛,最好唔好惹佢。
    佢呢排心火盛,最好唔好惹佢。
    keoi5 ni1 paai4 sam1 fo2 sing6, zeoi3 hou2 m4 hou2 je5 keoi5.
    • It's better not to irritate him, as he is ill-tempered these days.