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"curse" is also used as a crossword clue. If that's what you saw, the answer is often hex (3 letters).
Definitions
utter obscenities or profanities
Word origin
From Middle English curse, kors, cors, curs, from Old English cors, curs (“curse”), of unknown origin.
Used in a sentence
“Oh Portius, is there not some choſen Curſe, Some hidden Thunder in the Stores of Heav’n, Red with uncommon Wrath, to blaſt the Man Who owes his Greatneſs to his Country’s Ruin?”
““The farm's had a lot of bad luck, you see. Dad thinks there is a curse on the place.” “Most like. Most like,” said Catweazle, gobbling the banana.”
“The common curſe of mankinde, Folly and Ignorance[…]”
Source: Wiktionary, CC BY-SA 4.0
Used as a crossword answer1 curated clues
01“Bad spell”5 letters
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