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cataclysm

noun [C]
 
 /ˈkæt̬·əˌklɪz·əm/

Definition

an extremely destructive event or violent change: environmental/natural cataclysms cataclysmic
 
 /ˌkæt̬·əˈklɪz·mɪk/ adjective
The city has just experienced a cataclysmic flood.
(Definition of cataclysm noun from the Cambridge Academic Content Dictionary © Cambridge University Press)
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