Swearing or using offensive language; or wishing harm or bad luck on someone through magical means.
Curse comes from Old English 'curs' and Old Norse 'kurs', with uncertain origins but possibly related to anger. The word has meant both swearing and magical harm-wishing since medieval times.
Cursing is one of the few behaviors that nearly every human culture has—anthropologists find curse words in languages across the world, suggesting swearing is as fundamental to human expression as laughing!
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