cataclysmal

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cat·a·clysm

 (kăt′ə-klĭz′əm)
n.
1. A violent upheaval that causes great destruction or brings about a fundamental change.
2. A violent and sudden change in the earth's crust.
3. A devastating flood.

[French cataclysme, from Latin cataclysmos, deluge, from Greek kataklusmos, from katakluzein, to inundate : kata-, intensive pref.; see cata- + kluzein, to wash away.]

cat′a·clys′mic (-klĭz′mĭk), cat′a·clys′mal (-klĭz′məl) adj.
cat′a·clys′mi·cal·ly adv.
ThesaurusAntonymsRelated WordsSynonymsLegend:
Adj.1.cataclysmal - severely destructive; "cataclysmic nuclear war"; "a cataclysmic earthquake"
destructive - causing destruction or much damage; "a policy that is destructive to the economy"; "destructive criticism"

cataclysmal

adjective