A person who forms or participates in a cartel, which is an agreement between competing companies to control prices and divide markets.
From 'cartel' (from Italian cartello, meaning a written agreement or placard) + the suffix '-ist' meaning a person who practices or advocates something.
Cartels have been historically used by groups ranging from oil producers to diamond miners, and the word became infamous during the 20th century when governments began outlawing them as anti-competitive practices that harm consumers.
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