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Jyutping guk1 daai3
Pinyin jū dài

Definitions (Wiktionary)
  1. noun, Min-Nan
    elastic cord
    (syn.) 牛筋带, 橡奶帶, 牛筋帶, 橡奶带, 鬆緊帶, 松紧带, 猴皮筋兒