'brand-new' originates from the Old English word 'brand,' which referred to a piece of burning wood. The term 'brand-new' was used to describe something as fresh as if it had just come from the fire.

'brand' changed from the Old English word 'brand' meaning 'fire' or 'torch' and eventually became part of the modern English expression 'brand-new.'

Initially, it meant 'fresh from the fire,' but over time it evolved into its current meaning of 'completely new.'