The story
- Ancient Greek · derived fromγυμνάσιον“exercise, school”
- Latin · borrowed fromgymnasium
- English todaygymnasium
From Latin gymnasium, from Ancient Greek γυμνάσιον (gumnásion, “exercise, school”), from γυμνός (gumnós, “naked”), because Greek athletes trained naked.
Etymology from Wiktionary, CC BY-SA 4.0.