The Proto-Turkic word *uk-
Word *uk-
Meaning to understand
Synonyms *āŋ(la-)

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
*gör- ‘eye, to see, look’