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Jyutping waai4 saan1 joek6
Pinyin huái shān yào

Definitions (Wiktionary)
  1. noun
    Chinese yam (Dioscorea polystachya)
    (syn.) 山藥薯, 薯蕷, 山藥, 山艿, 懷山藥, 鐵棍兒山藥, 淮山, 薯, 長山藥, 山薯