The screw, the lever, the wedge, the pulley, etc. are called simple machines.
A wedge of pie.
A wedge of wood is thick at one end and thin at the other, and can be used for holding a door open or for stopping vehicle sliding backwards down a hill.
wedge – this machine can split objects and push apart the pieces.
The boat was now wedged between the rocks.
A wedge—excuse me—just won’t cut it. Tête de Moine cheese needs a Girolle, and a Girolle needs Tête de Moine—no other cheese has just the right characteristics to make this sort of cheese flower.