위층이 · 위층을
upstairs, the floor above
Example
위층에서 밤마다 쿵쿵 뛰는 소리가 나요.
Every night there's a thumping sound of someone running upstairs.
Word parts
층 layer, floor
Native 위 'above' + 층 'floor, story'. Opposite: 아래층 'downstairs'.
Good to know
Spelled 위층, never 윗층: no ㅅ is added before an aspirated sound like ㅊ. Noise from the flat above (층간 소음 'between-floor noise') is a classic cause of neighbor disputes in Korean apartments.
Related words