cataclysmic

 
Pronunciation: /katəˈklɪzmik/

adjective

  • (of a natural event) large-scale and violent: a cataclysmic earthquake
  • causing sudden and violent upheaval: a novel about a cataclysmic world war
  • informal used to emphasize the extent of something bad or unwelcome: the concert was a cataclysmic failure

Derivatives

cataclysmically

Pronunciation: /-ˈklɪzmɪk(ə)li/
adverb