'upgrader' originates from the English word 'upgrade,' where 'up-' meant 'to a higher position' and 'grade' meant 'a level or step.'

'upgrade' transformed from the Old French word 'grade,' and eventually became the modern English word 'upgrade' through Middle English.

Initially, it meant 'to raise to a higher grade or rank,' but over time it evolved into its current meaning of 'to improve or enhance.'