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Jyutping bou3 doi6 lin4
Pinyin bù dài lián

Definitions (Wiktionary)
  1. noun
    common water hyacinth (Eichhornia crassipes)
    (syn.) 水浮蓮, 水葫蘆, 水葫芦, 凤眼蓝, 水浮莲, 鳳眼藍, 水芋仔