Tsuginawa 継縄
A rope extension: rope joined onto another rope so that a tie can continue with one longer length.
Shibari Study’s glossary defines tsuginawa (継縄) as rope that has been joined to another rope and derives the word from tsugi and nawa, rope. Andrea Ropes glosses tsugi as next or following and describes tsuginawa as the technique of joining two ropes into one long rope, a rope extension. As a dictionary noun, tsugi also covers joining and patching (Jisho). Andrea Ropes notes that the lark’s head, hibari musubi, is often used to join ropes.