scratch at something

But now something began to scratch at the wall from the other side.

The dog may start to scratch at the door to be let out.

Peter scratched at the hair on the back of his big right hand.

Sometimes the dog scratched at the door to be let in.

He scratched at his white hair and moved away from the wind.

He was about to take it to the car when scratching at the back door made him stop.

He began to scratch at something behind his left ear.

The most common sign is scratching of the bottom, particularly at night.

It was somebody scratching at the window, trying to get in.

The animals were scratching at the other side of the wall.