city of ancient Greece between Athens and Corinth, from Greek Megara, apparently the plural of megaron "hall, room, the inner space of a temple," in plural "house, palace," which Beekes says is "[u]ndoubtedly a technical loan from the substrate," perhaps adapted to mega. Its region was Megaris. Related: Megarian.
megalomaniac
megalomaniacal
megalopolis
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megapixel
Megara
megaspore
megatherium
megaton
megavolt
megawatt