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Jyutping duk6 bun3 bin1
Pinyin dú bàn biān

Definitions (Wiktionary)
  1. phrase
    A method people use to pronounce a Chinese character when they do not know its exact pronunciation: one of the (often two) components of the character is taken as a phonetic and that pronunciation is used, sometimes erroneously.
    (syn.) 有邊讀邊, 有边读边