downstairs
UK: ˌdaʊnˈsteəz | US: ˌdaʊnˈsterz
Definition
adv. on or to a lower floor of a building
adj. located on a lower floor
n. the lower floor(s) of a building
Structure
down <lower>stairs <steps>
Etymology
The word "downstairs" is a straightforward compound of "down" (Old English dūne, meaning "from a higher to a lower position") and "stairs" (Old English stǣger, meaning "steps"). It emerged in Middle English (14th century) to describe movement or location toward or on a lower floor. The logic is spatial: "down" indicates direction, while "stairs" specifies the means of vertical movement.
Examples
She ran downstairs to answer the door.
The downstairs bathroom is currently being renovated.
He left his keys on the downstairs table.
The noise came from the downstairs neighbors.
Please carry the boxes downstairs carefully.