enthusiast

The story

1. Ancient Greek · derived fromἐνθουσιαστής“an enthusiast, a zealot”
2. English todayenthusiast

From Ancient Greek ἐνθουσιαστής (enthousiastḗs, “an enthusiast, a zealot”), from ἐνθουσιάζειν (enthousiázein, “(intransitive) be inspired or possessed by a god, be rapt, be in ecstasy, (transitive) inspire”): see enthusiasm.