'pressurize' originates from the English word 'pressure', which comes from the Latin word 'pressura', where 'press-' meant 'to press'.

'pressura' transformed into the Old French word 'pression', and eventually became the modern English word 'pressure', leading to the verb 'pressurize'.

Initially, it meant 'to apply pressure', but over time it evolved into its current meaning of 'to maintain a certain pressure level'.