cataclysmal
/ˌkætəˈklɪzməl/
adjective
- Relating to or involving a sudden, violent event that causes great destruction or change.
- The cataclysmal flood swept away entire villages along the river.
- Scientists studied the cataclysmal effects of the asteroid impact on ancient Earth.
- The war had a cataclysmal impact on the region's economy and population.
Synonyms