The Proto-Turkic word *üŋ-
Word *üŋ-
Meaning to dig, delve, hole, cave
Synonyms *ü̅t

Comments
S. A. Starostin, A. V. Dybo, O. A. Mudrak - An Etymological Dictionary of Altaic Languages, 2003, Brill

Other words that might be of interest
*japur-gak ‘leaf’, *čɨ̅p ‘branch’, *urug ‘seed, kin’