chicanery \shih-KAY-nuh-ree\ (noun) - 1 : The use of trickery or sophistry to deceive (as in matters of law). 2 : A trick; a subterfuge.
"Here's how to talk and keep the upper hand:
For no man's half as barefaced as a woman
When it comes to chicanery and gammon." -- Geoffrey Chaucer, 'The Canterbury Tales
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Chicanery comes from French chicaner, "to quibble, to use tricks," perhaps from Middle Low German schicken, "to arrange," with the sense "to arrange to one's own advantage."