a wall of prejudice.
a wall of smoke.
a wall of water.
competition was pushing them to the wall.
he ducked behind the garden wall and waited.
his back was to the wall.
negotiations ran into a brick wall.
stomach walls.
the container's walls were blue.
the south wall had a small window.
the wall followed the road.
the walls of the cylinder were perforated.
the walls were covered with pictures.
they blew the trumpet and the walls came tumbling down.
they stormed the ramparts of the city.