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Jyutping sam6 wai4
Pinyin shèn wéi

Definitions (CC-CEDICT)
  1. very
  2. extremely
Definitions (Wiktionary)
  1. adv, followed by a disyllabic adjective, formal
    very; extremely
Definitions (Kaifangcidian)
  1. (沒有對應漢語詞彙)