'oppressor' originates from Latin, specifically the word 'oppressorem,' where 'opprimere' meant 'to press against, to crush.'

'oppressorem' transformed into the Old French word 'opresseur,' and eventually became the modern English word 'oppressor' through Middle English.

Initially, it meant 'to press against or crush,' but over time it evolved into its current meaning of 'one who exercises authority in a burdensome manner.'