'residential' originates from the Latin word 'residēre,' where 're-' meant 'back' and 'sedēre' meant 'to sit.'

'residēre' transformed into the Old French word 'resider,' and eventually became the modern English word 'reside,' from which 'residential' is derived.

Initially, it meant 'to sit back or remain,' but over time it evolved into its current meaning of 'pertaining to living or dwelling.'