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Jyutping gei2 jan4 jau1 tin1
Pinyin qǐ rén yōu tiān

Definitions (CC-CEDICT)
  1. man of Qǐ fears the sky falling (idiom); groundless fears
Definitions (粵典–words.hk)
  1. 動詞
    過份​擔心​,​擔心​一​啲​唔​會發​生​嘅​事
    to worry about something that is very unlikely to happen; literally: to worry that the sky might fall down
    • 邊有咁易世界末日吖,你唔使杞人憂天嘅。
      边有咁易世界末日吖,你唔使杞人忧天嘅。
      bin1 jau5 gam3 ji6 sai3 gaai3 mut6 jat6 aa1, nei5 m4 sai2 gei2 jan4 jau1 tin1 ge3.
      We all know the apocalypse is just a myth. You shouldn't worry too much.
Definitions (Wiktionary)
  1. phrase, idiomatic
    to have groundless fears
Definitions (Kaifangcidian)
  1. (沒有對應漢語詞彙)
Examples (粵典–words.hk)
  1. Cantonese
    边有咁易世界末日吖,你唔使杞人忧天嘅。
    邊有咁易世界末日吖,你唔使杞人憂天嘅。
    bin1 jau5 gam3 ji6 sai3 gaai3 mut6 jat6 aa1, nei5 m4 sai2 gei2 jan4 jau1 tin1 ge3.
    • We all know the apocalypse is just a myth. You shouldn't worry too much.
Examples (Wiktionary)
  1. Mandarin
    杞人忧天
    杞人憂天
    qǐ rén yōu tiān
    • The man of Qi worrying about the sky