Stopper (knot)

A stopper knot is a type of knot tied at the end of a rope to prevent the end from unraveling, or slipping through another knot.

The two most common types of stopper knot are the overhand knot, where the rope is formed into a loop and the end of the rope threaded through the loop, and the figure eight knot, a more complex knot that produces a larger lump at the end of the rope.