Cataclysmic

//ˌkætəˈklɪzmɪk// adj

Definitions

Adjective
  1. 1
    Of or pertaining to a cataclysm; causing great destruction or upheaval; catastrophic.

    "It is believed that a cataclysmic impact caused the extinction of the dinosaurs."

Adjective
  1. 1
    severely destructive wordnet

Etymology

From cataclysm + -ic.

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