Working end
The end of a rope that is actively being used to tie, as opposed to the standing end; Japanese rope vocabulary calls it nawajiri.
The working end is the active end of a line, the one being moved to form a knot or tie. Knot references also call it the running, live or tag end, and name the stretch between the knot and that end the working part. Rope365 describes it as the short end in general knot terminology. In rope bondage it is the part of the rope the person tying is handling; Anatomie Studio adds that it is usually kept under some tension so the connection with the tied person is held. Shibari Study’s glossary equates it with the Japanese nawajiri (縄尻) and defines it as the opposite of the standing end.