'energizer' originates from the English word 'energy,' which comes from the Greek word 'energeia,' where 'en-' meant 'in' and 'ergon' meant 'work.'

'energeia' transformed into the Latin word 'energia,' and eventually became the modern English word 'energy,' from which 'energizer' is derived.

Initially, it meant 'activity or operation,' but over time it evolved into its current meaning of 'a source of energy or stimulation.'