'enthuse' originates from Greek, specifically the word 'enthousiasmos,' where 'en-' meant 'in' and 'theos' meant 'god.'

'enthousiasmos' transformed into the French word 'enthousiasme,' and eventually became the modern English word 'enthuse' through Middle English.

Initially, it meant 'to be inspired or possessed by a god,' but over time it evolved into its current meaning of 'to express enthusiasm.'