enthusiasm

The story

1. Ancient Greek · derived fromἐνθουσιασμός
2. Late Latin · derived fromenthusiasmus
3. Middle French · derived fromenthousiasme
4. English todayenthusiasm

First attested from 1603, from Middle French enthousiasme, from Late Latin enthusiasmus, from Ancient Greek ἐνθουσιασμός (enthousiasmós), from ἐν (en, “in”) + θεός (theós, “god”) + οὐσία (ousía, “essence”).