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Jyutping ngaa4 zyu3
Pinyin yá zhù

Definitions (Wiktionary)
  1. noun, Min-Dong
    dental caries; tooth decay
    (syn.) 蛀齒 GT, 蛀齒, 爛牙齒, 牙蛀, 蟲蛀牙, 蛀牙, 蟲牙, 蟲吃牙, 齲齒, 蛀牙齒, GT - General Taiwaneseno specific region identified), 齒齲, 爛牙
Examples (粵典–words.hk)
  1. Cantonese
    我只大牙蛀咗。好彩牙医话可以补牙,唔使剥。
    我隻大牙蛀咗。好彩牙醫話可以補牙,唔使剝。
    ngo5 zek3 daa6 ngaa4 zyu3 zo2. hou2 coi2 ngaa4 ji1 waa6 ho2 ji5 bou2 ngaa4, m4 sai2 mok1.
    • My big tooth has a cavity; luckily though, my dentist said that he can fill it up without having to remove it.
  2. Cantonese
    只牙蛀烂咗,要杜牙根。
    隻牙蛀爛咗,要杜牙根。
    zek3 ngaa4 zyu3 laan6 zo2, jiu3 dou6 ngaa4 gan1.
    • I have a cavity and need a root canal.
  3. Cantonese
    小明食得太多糖,啲牙蛀晒。
    小明食得太多糖,啲牙蛀晒。
    siu2 ming4 sik6 dak1 taai3 do1 tong3, di1 ngaa4 zyu3 saa3.
    • Siu-ming eats too many sweets so he has tooth decay now.