'allegate' originates from Latin, specifically the word 'allegare,' where 'ad-' meant 'to' and 'legare' meant 'to send or dispatch.'

'allegare' transformed into the Old French word 'alleguer,' and eventually became the modern English word 'allegate' through Middle English.

Initially, it meant 'to send or dispatch,' but over time it evolved into its current meaning of 'to assert or declare without proof.'