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Jyutping gu2 sik1
Pinyin gǔ xí

Definitions (Wiktionary)
  1. adv, literary
    in ancient times

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Jyutping gu2 sik1
Pinyin gǔ xī

Definitions (CC-CEDICT)
  1. (literary) ancient times
  2. in olden days
Definitions (Wiktionary)
  1. adv, literary
    in ancient times
Definitions (Kaifangcidian)
  1. (沒有對應漢語詞彙)