'instigator' originates from Latin, specifically the word 'instigare,' where 'in-' meant 'into' and 'stigare' meant 'to prick or goad.'

'instigare' transformed into the Old French word 'instigateur,' and eventually became the modern English word 'instigator' through Middle English.

Initially, it meant 'to goad or urge on,' but over time it evolved into its current meaning of 'a person who initiates or incites an action or event.'