'high-energy' originates from the combination of 'high' and 'energy', where 'high' meant 'great in amount or degree' and 'energy' meant 'capacity for vigorous activity'.

'high-energy' evolved from the combination of the words 'high' and 'energy' in English, maintaining its meaning over time.

Initially, it meant 'having a lot of energy', and this meaning has largely remained the same in modern usage.