'assume' originates from Latin, specifically the word 'assumere,' where 'ad-' meant 'to' and 'sumere' meant 'take.'

'assumere' transformed into the Old French word 'assumer,' and eventually became the modern English word 'assume' through Middle English.

Initially, it meant 'to take to oneself,' but over time it evolved into its current meanings of 'suppose' and 'take on responsibility.'