From Wiktionary, the free dictionary
From Proto-Turkic *kapgak. Cognate to Kyrgyz капкак (kapkak), etc.
какпак • (kakpak)
- lid, cover
- N. A. Baskakov, Toščakova N.A, editor (1947), “какпак”, in Ojrotsko-Russkij Slovarʹ [Oyrot-Russian Dictionary], Moscow: M.: OGIZ, →ISBN