'purchaser' originates from Old French, specifically the word 'purchacier,' where 'pour-' meant 'for' and 'chacier' meant 'to chase or hunt.'

'purchacier' transformed into the Middle English word 'purchasen,' and eventually became the modern English word 'purchase.'

Initially, it meant 'to chase or hunt for something,' but over time it evolved into its current meaning of 'to buy or acquire something.'