'agistator' originates from the Latin word 'agistare', where 'agist-' meant 'to pasture or graze'.

'agistare' transformed into the Old French word 'agister', and eventually became the modern English word 'agistator'.

Initially, it meant 'to pasture or graze animals', but over time it evolved into its current meaning of 'a person who takes in livestock for grazing'.