'arbiter' originates from Latin, specifically the word 'arbiter', where 'ar-' meant 'to' and 'biter' meant 'to go'.

'arbiter' changed from the Old French word 'arbitre' and eventually became the modern English word 'arbiter'.

Initially, it meant 'a person appointed to judge or decide', but over time it evolved into its current meaning of 'a person who settles a dispute or has ultimate authority in a matter'.