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Jyutping gu1 lau6 gwaa2 man4
Pinyin gū lòu guǎ wén

Definitions (CC-CEDICT)
  1. ignorant and inexperienced
  2. ill-informed and narrow-minded
Definitions (粵典–words.hk)
  1. 形容詞
    形容​自己​學識​淺​薄​,​見識少​;​通常​用作​謙詞
    unknowledgeable; unworldly; unsophisticated; usually as an honorific
    • 恕我孤陋寡聞,不如你解釋一下?
      恕我孤陋寡闻,不如你解释一下?
      syu3 ngo5 gu1 lau6 gwaa2 man4, bat1 jyu4 nei5 gaai2 sik1 jat1 haa5?
      Pardon my ignorance. Would you care to explain?
Definitions (Wiktionary)
  1. phrase, idiomatic
    ignorant and ill-informed
Definitions (Kaifangcidian)
  1. (沒有對應漢語詞彙)
Definitions (HSK3.0)
  1. HSK3 七一九级词汇表 #1406
Examples (粵典–words.hk)
  1. Cantonese
    恕我孤陋寡闻,不如你解释一下?
    恕我孤陋寡聞,不如你解釋一下?
    syu3 ngo5 gu1 lau6 gwaa2 man4, bat1 jyu4 nei5 gaai2 sik1 jat1 haa5?
    • Pardon my ignorance. Would you care to explain?
  2. Cantonese
    孤陋寡闻
    孤陋寡聞
    gu1 lau6 gwaa2 man4
    • ignorant; ill-informed