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Jyutping aa1 jo1
Pinyin ā ㄧㄛ

Definitions (Wiktionary)
  1. intj
    ow; oh no (expressing surprise, sudden pain, etc.)

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Jyutping aa1 jo1
Pinyin ā yo

Definitions (CC-CEDICT)
  1. interjection of surprise or pain
  2. Oh
  3. Ow
  4. My goodness!