I bought a three-ply rope.
paper string; twisted paper cord
twisted paper string; twisted paper cord
Standard kanji spelling for twist or ply in textiles and cords.
Kana spelling is common in everyday writing, especially when the kanji is not needed.
Alternate kanji spelling; less common than 撚り but still used.
Noun form of the verb 撚る (よる, 'to twist'). The kanji 撚 specifically relates to twisting fibers.