Nitka (f)
winding: thread, wound around the base of a single reed, also used for tuning (as a bridle)
Though a common word in Polish, in Pilecki it is printed in italics (➺ nitką [instrumental case]), as if it is the name of the winding that is used as a "bridle".
Made of yarn.
Pilecki, Czesław: "Gajdy": ludowy instrument muzyczny w Beskidzie Śląskim (Les "gajdy": instrument de musique populaire du Beskide de Silésie). In: Roczniki etnogr.śląskiej 4 (Wrocław, 1972), p.105.
ws (linguistics [➺ Dictionaries, &c.])