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Jyutping hoi1 zok6
Pinyin kāi záo

Definitions (CC-CEDICT)
  1. to cut (a canal, tunnel, well etc)
Definitions (Wiktionary)
  1. verb, transitive
    to dig (tunnels, river channels, etc.)
    (syn.) 採掘, 采掘, 挖掘, 開掘, 開採, 开采, 开掘, 發掘, 发掘
Definitions (Kaifangcidian)
  1. (沒有對應漢語詞彙)
Examples (粵典–words.hk)
  1. Cantonese
    开凿运河
    開鑿運河
    hoi1 zok6 wan6 ho4
    • to build a canal