downstairs
🇺🇸
/ˌdaʊnˈsterz/
🇬🇧
/ˌdaʊnˈsteəz/
to or on a lower floor
He went downstairs to get his shoes.
彼は靴を取りに階下へ行った。
on a lower floor
The downstairs bathroom is being cleaned.
階下のトイレは掃除中です。
the lower floor
The downstairs needs new furniture.
階下には新しい家具が必要です。