This is the 9617th most frequent Korean word.
계단을
"계단을" means "stairs" or "staircase" (accusative case).
The word '계단을' here is in the accusative case and serves as the object of the verb '올라갔다' which means 'went up'.
그녀는 계단을 올라갔다.
She went up the stairs.
In this sentence, '계단을' is used as the object of the verb '내려오세요,' which means 'to come down,' highlighting an action on the stairs.
계단을 조심스럽게 내려오세요.
Please come down the stairs carefully.
Here, '계단을' acts as the object of the verb '청소했다,' meaning 'cleaned,' showing that the stairs are the target of the cleaning action.