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Jyutping sam1 seon3
Pinyin shēn xìn

Definitions (CC-CEDICT)
  1. to believe firmly
Definitions (粵典–words.hk)
  1. 動詞
    好​肯定​咁​信一樣​嘢​,​無懷疑​或者​動搖
    to be deeply convinced; to believe firmly
    • 深信不疑
      深信不疑
      sam1 seon3 bat1 ji4
      to be totally convinced beyond all doubt
Definitions (Wiktionary)
  1. verb
    to firmly believe; to be of the firm belief that
    (syn.) 相信, 信据, 信據, 信任, 信, 信实, 憑信, 凭信, 置信, 信實
Definitions (Kaifangcidian)
  1. (沒有對應漢語詞彙)
Definitions (HSK3.0)
  1. HSK3 七一九级词汇表 #3627
Examples (Tatoeba—Mandarin-English)
  1. Mandarin
    我深信事情会往更好的方向转变。
    我深信事情會往更好的方向轉變。
    wǒ shēn xìn shì qing huì wǎng gèng hǎo de fāng xiàng zhuǎn biàn 。
    • I am convinced that things will change for the better.
Examples (粵典–words.hk)
  1. Cantonese
    深信不疑
    深信不疑
    sam1 seon3 bat1 ji4
    • to be totally convinced beyond all doubt
Examples (Wiktionary)
  1. Mandarin
    我对那人说的话深信不疑。
    我對那人説的話深信不疑。
    wǒ duì nà rén shuō de huà shēn xìn bù yí .
    • I firmly believe in / have no doubt about what that person says.