upstairs **
up the stairs
on a higher floor

He went back into the house and up the stairs.

I held her hand as we went up the stairs.

She went with me up the stairs and into his study.

They went back up the stairs and left the room.

I went up the stairs and into the living room.

We made our way up the stairs and through the door.

Up the stairs, turn to the right, and go into the second door you see.

He turned and started back up the stairs, one step at a time.

The four get out of the car and make their way up the stairs.

They can also try to force their way up the stairs.