A fastening made by tying a rope or string?

A fastening made by tying a rope or string is commonly referred to as a knot. Knots can serve various purposes, such as securing objects, creating loops, or connecting two lengths of rope. Different types of knots, like the square knot, bowline, and clove hitch, are designed for specific applications, each providing varying levels of security and ease of untieing. Mastering different knots is essential in activities such as sailing, climbing, and camping.