Twine is a strong thread, light string or cord composed of string two or more thinner strands twisted, and then twisted together (plied). The strands are plied in the opposite direction to that of their twist, which adds torsional strength to the cord and keeps it from unravelling. This process is sometimes called reverse wrap. The same technique used for making twine is also used to make thread, which is thinner, yarn, and rope, which is stronger and thicker, generally with three or more strands.
Twine showing component strands
Binder twine securing a hay bale
A rope is a group of yarns, plies, fibres, or strands that are twisted or braided together into a larger and stronger form. Ropes have tensile strength and so can be used for dragging and lifting. Rope is thicker and stronger than similarly constructed cord, string, and twine.
A coil of right-handed laid three-strand rope
Three-strand natural fibre laid line
Hawser-laid rope (Seaman's Pocket-Book, 1943)
Bollard and mooring line