Proto-Altaic: *bṑki ( ~ -e)
Meaning: to stop up
Russian meaning: затыкать, задерживать
Comments: EAS 58, KW 54, Poppe 58, 59 (Turk.-Mong.). A Western isogloss. The root is quite well attested in Turkic and borrowing is highly improbable, so Doerfer's (TMN 1, 229) skepticism seems ungrounded. A slight problem is the variation of *-k- and *-g- in Turkic, probably assimilative in this case (*bök- should be the original variant).