換奶齒 [换－齿]

Jyutping wun6 naai ci2
Pinyin huàn nǎi chǐ

Definitions (Wiktionary)
  1. verb, Zhangzhou-Hokkien, of a child
    to grow permanent teeth to replace milk teeth
    (syn.) 龆龀, 换牙, 換齒, 换齿, 蜕齿, 齠齔, 換牙, 蛻齒