Other forms: prongs
A prong, like a spike, a tine, or a spoke, is something that sticks out and is pointy. The prongs of your fork are useful for spearing food and delivering it to your mouth.
Besides forks, many other objects have prongs, from hoes and rakes to electrical plugs to an animal's horns or antlers (in fact there's a specific group of antelopes commonly called pronghorns). Before it was spelled prong, the word was prange, "pointed instrument," from the Anglo-Latin pronga, "pointed tool," and possibly the Germanic prange, "stick."