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Jyutping hoi1 hiu3
Pinyin kāi qiào

Definitions (CC-CEDICT)
  1. to get it straight
  2. to start to understand things properly
  3. enlightenment dawns
Definitions (粵典–words.hk)
  1. 動詞
    明白​咗​啲​嘢
    to begin to understand; to have one's idea straightened out
    • 先生一講,我就開竅。
      先生一讲,我就开窍。
      sin1 saang1 jat1 gong2 ngo5 zau6 hoi1 hiu3
      I understood and straightened my ideas out as soon as the teacher explained it.
    • 佢咁細個,仲未開竅嘅。 慢慢教喇。
      佢咁细个,仲未开窍嘅。 慢慢教喇。
      keoi5 gam3 sai3 go3 zung6 mei6 hoi1 hiu3
      He is still too young to understand things very quickly. Be patient and try to teach him step by step.
Definitions (Wiktionary)
  1. verb, figuratively, of a child
    to begin to know things
  2. verb, figuratively
    to be enlightened; to begin to understand
  3. verb, Chinese, traditional
    to open the body orifices
Definitions (Kaifangcidian)
  1. (沒有對應漢語詞彙)
Examples (粵典–words.hk)
  1. Cantonese
    先生一讲,我就开窍。
    先生一講,我就開竅。
    sin1 saang1 jat1 gong2 ngo5 zau6 hoi1 hiu3
    • I understood and straightened my ideas out as soon as the teacher explained it.
  2. Cantonese
    佢咁细个,仲未开窍嘅。 慢慢教喇。
    佢咁細個,仲未開竅嘅。 慢慢教喇。
    keoi5 gam3 sai3 go3 zung6 mei6 hoi1 hiu3
    • He is still too young to understand things very quickly. Be patient and try to teach him step by step.