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Circle comes from Old French cercle ‘circle (shape)’, and goes back to Latin circus.

1. Latinc. 75 BCE–200 CEcircus¹‘circle’
2. Latinc. 75 BCE–200 CEcirculus¹diminutive of circus
3. Old Frenchc. 842–1400cercle¹‘circle’
4. Middle Englishc. 1150–1500circle¹
5. Englishearliest quotation c. 1598–1600circle¹

1. ¹ Wiktionary, English circle
2. Earliest quotation in Wiktionary’s entry: c. 1598–1600, William Shakespeare, As You Like It: “in the circle of this forest”.