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Jyutping dim2 bat1 zi1
Pinyin diǎn bù zhī

Definitions (CC-CANTO)
  1. unexpectedly (spoken)
Definitions (粵典–words.hk)
  1. 代詞、舊式
    見​ ​點知
    see 點知
  2. 近義詞
    點知
Definitions (Wiktionary)
  1. adv, Cantonese
    Synonym of 點知/点知 (“who would have thought; little did one know; how was one to know”).
    (syn.) 点知, 點知
Definitions (Kaifangcidian)
  1. 誰知 – 谁知
  2. 怎料
  3. 原來 – 原来
  4. 誰知道 – 谁知道
  5. 沒想到 – 没想到
  6. 想不到
  7. 哪兒知道 – 哪儿知道
  8. 誰料得到 – 谁料得到
  9. 料想不到
Examples (粵典–words.hk)
  1. Cantonese
    本身以为呢铺我会赢,点不知衰收尾,临尾香咗。
    本身以為呢鋪我會贏,點不知衰收尾,臨尾香咗。
    bun2 san1 ji5 wai4 ni1 pou1 ngo5 wui5 jeng4, dim2 bat1 zi1 seoi1 sau1 mei5, lam4 mei5 hoeng1 zo2.
    • I thought I would have won this round, but I lost at the very last moment.