'unenthusiastically-formed' originates from the prefix 'un-' meaning 'not,' combined with 'enthusiastically,' which comes from the Greek word 'enthousiasmos,' meaning 'inspiration or possession by a god,' and 'formed,' from the Latin 'formare,' meaning 'to shape or mold.'

'Enthusiastically' evolved from the Greek 'enthousiasmos' to the Latin 'enthusiasmus,' and eventually into the English 'enthusiastic.' The prefix 'un-' was added to negate the meaning, and 'formed' was appended to describe the manner of creation.

Initially, 'enthusiastically' meant 'inspired by a god,' but over time it evolved to mean 'with great excitement or interest.' The addition of 'un-' and 'formed' created a new meaning of 'created without enthusiasm.'