Čopyk [Čopik?] (gender unknown)
original: чопик
special plug used to stop [silence] the drone
Plug, used to stop [silence] the drone, if required; NB¹: Even though the text of the Atlas is in Russian, I decided to use the common transliteration of Ukrainian чопик; The transliteration of the (identical Cyrillic) spelling in Russian would be čopik, the translation of which remains the same.
Атлас музыкальных инструментов народов СССР = Atlas of musical instruments of the peoples inhabiting the USSR [1963]. Вертков, Константин А. (Vertkov, Konstantin A.) / Благодатов, Георгий И. (Blagodatov, Georgij I.) / Язовицкая, Эльза Э. (Jazovickaja, El’za E.). Москва (Moskva), 1975 (2), p.50.
ws (linguistics [➺ Dictionaries, &c.])