A rope is a twisted or braided length of fibres. Thinner versions include cord, string and twine. If the rope has a specific function then it may be called a line.
The joining of one rope to another is known as splicing, the tying of a stopper, loop or any other self-sufficient binding is known as a knot. Ropes may also be braided/plaited, hitched or looped. The ends of a rope may be whipped to prevent fraying.