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Noun: cataclysm  'ka-tu,kli-zum
  1. A sudden violent change in the earth's surface
    - catastrophe
  2. An event resulting in great loss and misfortune
    "the whole city was affected by the irremediable cataclysm";
    - calamity, catastrophe, disaster, tragedy

Derived forms: cataclysms

Type of: bad luck, geological phenomenon, misfortune

Encyclopedia: Cataclysm