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Jyutping nang4 jin4
Pinyin néng yán

Definitions (Wiktionary)
  1. verb, literary
    to have a way with words
  2. verb, literary
    to be able to speak
Examples (粵典–words.hk)
  1. Cantonese
    能言善辩
    能言善辯
    nang4 jin4 sin6 bin6
    • talkative and good at debating