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Jyutping hoi1 si6
Pinyin kāi shì

Definitions (粵典–words.hk)
  1. x
Definitions (Wiktionary)
  1. verb
    to reveal; to show; to display
    (syn.) 展示, 顯示, 显示
  2. verb
    to show clearly; to demonstrate
    (syn.) 指明
  3. verb
    to indicate; to point out
    (syn.) 指示
  4. verb
    to inspire; to enlighten; to stimulate
    (syn.) 启示, 啟示, 启发, 啟發

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Jyutping
Pinyin kāi shì

Definitions (CC-CEDICT)
  1. to instruct (novices)
  2. to preach
  3. to teach
  4. to reveal