apocalyptic
/əˈpɒ.kə.lɪp.tɪk/noun
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One who predicts apocalypse.
Synonyms:
apocalypticist, doomsayer
adjective
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Of or relating to an apocalypse:
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Portending a future apocalypse (disaster, devastation, or doom).
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Eggcorn of apoplectic.
"He was apocalyptically furious."
Antonyms:
nonapocalyptic