diadem

The story

1. Ancient Greek · derived fromδιάδημα“band, especially worn around a tiara”
2. Latin · derived fromdiadēma
3. Old French · derived fromdiademe
4. Middle English · inherited fromdiademe
5. English todaydiadem

From Middle English diademe, dyademe, from Old French diademe, from Latin diadēma, from Ancient Greek διάδημα (diádēma, “band, especially worn around a tiara”), from διαδέω (diadéō, “bind around”).