'reestablish' originates from the prefix 're-' meaning 'again' and the word 'establish' from Old French 'establir', which meant 'to set up'.

'establir' transformed into the Middle English word 'establishen', and eventually became the modern English word 'establish'.

Initially, it meant 'to set up or found something', but over time it evolved into its current meaning of 'to set up again'.