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Jyutping ku1 ngaa4
Pinyin gū yá

Definitions (CC-CANTO)
  1. Orthodontic; braces (for teeth)
Definitions (粵典–words.hk)
  1. 動詞
    矯正牙​齒​嘅​排列
    to receive or perform orthodontic treatment
    • 趁後生去箍牙冇咁痛㗎。
      趁后生去箍牙冇咁痛㗎。
      can3 hau6 saang1 heoi3 ku1 ngaa4 mou5 gam3 tung3 gaa3.
      Undergoing orthodontic treatment at an early age will be less painful.
Definitions (Wiktionary)
  1. verb, Cantonese, verb-object
    to wear dental braces
Definitions (Kaifangcidian)
  1. 牙齒矯正 – 牙齿矫正
  2. 齒列矯正 – 齿列矫正
Examples (粵典–words.hk)
  1. Cantonese
    趁后生去箍牙冇咁痛㗎。
    趁後生去箍牙冇咁痛㗎。
    can3 hau6 saang1 heoi3 ku1 ngaa4 mou5 gam3 tung3 gaa3.
    • Undergoing orthodontic treatment at an early age will be less painful.
  2. Cantonese
    箍牙
    箍牙
    ku1 ngaa4
    • dental braces
  3. Cantonese
    箍牙
    箍牙
    • putting on braces