'enthusiastically' originates from Greek, specifically the word 'enthousiasmos,' where 'en-' meant 'in' and 'theos' meant 'god.' 'Built' comes from Old English 'byldan,' meaning 'to construct.'

'enthousiasmos' transformed into the Latin word 'enthusiasmus,' and eventually became the modern English word 'enthusiasm.' 'Byldan' evolved into the Middle English 'bilden,' and eventually became 'build.'

Initially, 'enthousiasmos' meant 'possessed by a god,' but over time it evolved into its current meaning of 'intense enjoyment or interest.'