English to English

noun (n)

• an event resulting in great loss and misfortune(noun.event)

  Example:
  The whole city was affected by the irremediable calamity.
  

  Synonym:
  cataclysm, catastrophe, disaster, tragedy
  

  source: wordnet30
• Any great misfortune or cause of misery; -- generally applied to events or disasters which produce extensive evil, either to communities or individuals.(noun)

  source: webster1913