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Jyutping cou4 zi2
Pinyin cáo zi

Definitions (Wiktionary)
  1. noun
    concave section; depression
    (syn.) 槽
  2. noun
    ditch; trench; canal
    (syn.) 槽, 溝, 沟
  3. noun
    manger; trough from which livestock feeds
  4. noun
    square or rectangular container
    (syn.) 槽