'encumber' originates from Old French, specifically the word 'encombrer,' where 'en-' meant 'in' and 'combrer' meant 'to block or hinder.'

'encombrer' transformed into the Middle English word 'encumbren,' and eventually became the modern English word 'encumber.'

Initially, it meant 'to block or hinder,' but over time it evolved into its current meaning of 'to burden or weigh down.'