The Proto-Turkic word *bur(a)-
Word *bur(a)-
Meaning to twist, wind round
See also Proto-Altaic: *mura ‘round’
Synonyms *kadɨr-, *čebir-, *dolga-

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
*eg- ‘to bend’, *kaŋïr ‘to bend’