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nefasto

disastrous

adjective neh-FAHS-toh Rare

Origin: From Latin nefastus (forbidden, ill-omened)

Also means

ill-fated

Usage Note

Nefasto is stronger than malo — it implies a catastrophically bad outcome or a deeply unlucky omen. Un día nefasto is not just a bad day but a truly calamitous one. The word retains the formal Latin flavour and is common in written journalism. The feminine is nefasta; the adverb is nefastamente.

Examples

"Fue una decisión nefasta para la empresa."

Natural Translation

It was a disastrous decision for the company.

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