'aether' originates from Greek, specifically the word 'aithēr,' where 'aith-' meant 'to burn or shine.'

'aithēr' transformed into the Latin word 'aether,' and eventually became the modern English word 'aether' through Old French.

Initially, it meant 'the upper pure, bright air,' but over time it evolved into its current meaning of 'ethereal or celestial.'