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Jyutping seoi6 si6 gwan1 gun1 dou1
Pinyin ruì shì jūn guān dāo

Definitions (Wiktionary)
  1. noun
    Swiss Army knife
    (syn.) 万用刀, 萬用刀, 瑞士军刀, 瑞士刀, 瑞士軍刀