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Jyutping ke4 dou1 wai3
Pinyin qí dū wèi

Definitions (Wiktionary)
  1. noun, archaic
    captain of the cavalry
  2. noun, archaic
    a non-imperial nobility title of Qing dynasty

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Jyutping gei6 dou1 wai3
Pinyin jì dū wèi

Definitions (CC-CANTO)
  1. commandant of cavalry