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Jyutping aa3 hau2
Pinyin yà kǒu

Definitions (Wiktionary)
  1. noun, dialectal
    narrow mountain pass; col; narrow piece of land between two mountains

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Jyutping aa3 hau2
Pinyin yā kǒu

Definitions (CC-CEDICT)
  1. (dialect) narrow mountain pass
Definitions (Wiktionary)
  1. noun, dialectal
    narrow mountain pass; col; narrow piece of land between two mountains