People who betray their country, group, or a person they have sworn loyalty to.
From Old French 'traitour,' derived from Latin 'tradere' (to hand over or deliver); the word literally meant 'one who hands over,' referring to someone who delivers secrets or betrays trust.
Traitors occupy a unique place in human psychology—we hate them intensely because betrayal requires trust first, and breaking trust feels like a wound to our fundamental social bonds that evolved over millions of years!
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