'encroachment' originates from Old French, specifically the word 'encrochier,' where 'en-' meant 'in' and 'crochier' meant 'to seize or hook.'

'encrochier' transformed into the Middle English word 'encrochen,' and eventually became the modern English word 'encroach.'

Initially, it meant 'to seize or hook into something,' but over time it evolved into its current meaning of 'gradually taking over or intruding.'