The story
PIE word *dwóh₁ From duo- (prefix meaning ‘two’) + -poly (suffix meaning ‘pertaining to the number of sellers in a market’), by analogy with monopoly.
Etymology from Wiktionary, CC BY-SA 4.0.
duopoly
du·o·po·lyToday it means: An economic condition in which two sellers exert most control over the market of a commodity. Full definition →