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Jyutping jyu6
Pinyin

Definitions (CC-CANTO)
  1. hole in a wall/a small door or window

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Jyutping jyu4
Pinyin

Definitions (CC-CEDICT)
  1. hole in a wall
Definitions (CC-CANTO)
  1. hole in a wall/a small door or window
Definitions (Wiktionary)
  1. character, literary
    hole in a wall
  2. character
    to climb over (a wall)
  3. character, literary
    to bore; to dig out
Definitions (Unihan)
  1. a small door or window
  2. a hole in the wall to cut through a wall
  3. Cangjie Input
    JCOMN