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Jyutping zeon6 gan1 ngaa4
Pinyin jǐn gēn yá

Definitions (Wiktionary)
  1. noun, Wu
    wisdom tooth
    (syn.) 智牙, 智慧齒, 後層, 盡根牙, 盡頭牙, 淨根牙, 智齒, 盡頭兒牙