The steps on a ladder are called "rungs." The length of a ladder determines how many rungs the ladder has, and the longer the ladder, the more rungs it has. The word is pronounced "ruhng."
The word "rung" dates back before 1000 A.D. and derives from the Old English word "rhung," and the German word "runge." Rung is also a cognate with the Gothic word "hrunga," meaning "rod."
Rung also may be used to describe a spoke of a wheel, a level in a formal system of hierarchy or a piece of wood that is placed between the legs of a chair for support.