'occupational' originates from the Latin word 'occupatio', where 'occupare' meant 'to seize or take possession of'.

'occupatio' transformed into the Old French word 'occupation', and eventually became the modern English word 'occupation', from which 'occupational' is derived.

Initially, it meant 'to take possession of', but over time it evolved into its current meaning of 'related to one's job or profession'.