staircase
US /ˈster.keɪs/
UK /ˈster.keɪs/

1.
계단
a set of stairs and its surrounding structure
:
•
The grand staircase led up to the ballroom.
웅장한 계단이 무도회장으로 이어졌다.
•
Be careful when you go down the staircase, it's a bit slippery.
계단을 내려갈 때 조심해, 좀 미끄러워.