'accouterment' originates from French, specifically the word 'accoutrer,' where 'a-' meant 'to' and 'couter' meant 'sew or dress.'

'accoutrer' transformed into the English word 'accouterment' through Middle English.

Initially, it meant 'to dress or equip,' but over time it evolved into its current meaning of 'accessory item of clothing or equipment.'