'reduction' originates from Latin, specifically the word 'reductio,' where 're-' meant 'back' and 'ducere' meant 'to lead.'

'reductio' transformed into the Old French word 'reduction,' and eventually became the modern English word 'reduction' through Middle English.

Initially, it meant 'to lead back or bring back,' but over time it evolved into its current meaning of 'making something smaller or less.'