'chimneypiece' originates from Middle English, specifically the word 'chimney' combined with 'piece', where 'chimney' meant 'fireplace' and 'piece' referred to a part or section.

'chimneypiece' changed from the Middle English word 'chimney' and 'piece' and eventually became the modern English word 'chimneypiece'.

Initially, it meant 'a part of the fireplace', but over time it evolved into its current meaning of 'a decorative or functional structure surrounding a fireplace'.