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Jyutping gwai2 gai3 do1 dyun1
Pinyin guǐ jì duō duān

Definitions (CC-CEDICT)
  1. deceitful in many ways (idiom); wily and mischievous
  2. full of craft and cunning
Definitions (Wiktionary)
  1. phrase, idiomatic
    to have many crafty plots
Definitions (Kaifangcidian)
  1. (沒有對應漢語詞彙)
Examples (Tatoeba—Mandarin-English)
  1. Mandarin
    德国人诡计多端。
    德國人詭計多端。
    dé guó rén guǐ jì duō duān 。
    • The Germans are very crafty.
Examples (粵典–words.hk)
  1. Cantonese
    诡计多端
    詭計多端
    gwai2 gai3 do1 dyun1
    • full of craft and cunning; deceitful in many ways; wily and mischievous