staircase / stairs
scale
SKAH-lah
'Scala' is also a ladder. In Italian buildings, the ground floor is 'piano terra', and the first floor up is 'primo piano'.
Salgo le scale per andare al primo piano.
I climb the stairs to go to the first floor.
L'ascensore è rotto, dobbiamo usare le scale.
The lift is broken, we have to use the stairs.