'trespasser' originates from Old French, specifically the word 'trespasser,' where 'tres-' meant 'beyond' and 'passer' meant 'to pass.'

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

Initially, it meant 'to pass beyond a boundary,' but over time it evolved into its current meaning of 'to enter unlawfully.'