The story
- Proto-Indo-European*h₁éǵʰ
- Proto-Indo-European*h₁eǵʰs
- Proto-Hellenic*eks
- Ancient Greekἐκ (ek)
- Ancient Greekἐκ- (ek-)
- Proto-Indo-European*ḱen-?
- Proto-Indo-European*ḱéntrom
- Proto-Hellenic*kéntron
- Ancient Greekκέντρον (kéntron)
- Ancient Greekἔκκεντρος (ékkentros)
- Medieval Latineccentricus
- Middle Frenchexcentrique
- English todayeccentric
From Middle French excentrique, from Medieval Latin eccentricus, from Ancient Greek ἔκκεντρος (ékkentros, “not having the earth as the center of an orbit”), from ἐκ (ek, “out”) + κέντρον (kéntron, “point”). Equivalent to ex- + -centric.
Etymology from Wiktionary, CC BY-SA 4.0.