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Jyutping coek3 kwan1
Pinyin zhuō kūn

Definitions (Wiktionary)
  1. noun, Zhangzhou-Hokkien
    frigate tuna (Auxis thazard)
    (syn.) 鉛推, 炸彈, 扁花鰹 Taiwan, 桌鯤, 水鯤, 扁舵鰹 Mainland China