A person who uses tricks, deception, and cunning to fool or cheat others.
From guile (deception) + -er agent suffix denoting one who performs an action. This old English term dates to medieval times when describing someone skilled in the art of trickery.
The term 'guiler' appears surprisingly often in 16th-century literature, suggesting that con artists and tricksters were common enough to warrant a specific word—showing this problem is ancient.
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