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Jyutping daap3 caa4 ji4
Pinyin dā chár

Definitions (Wiktionary)
  1. verb, colloquial
    to join in a conversation; to respond
    (syn.) 绁喙, 紲喙

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Jyutping daap3 caa4 ji4
Pinyin dā chá r5

Definitions (CC-CEDICT)
  1. erhua variant of 搭茬[da1 cha2]