The Proto-Turkic word *buruk-
Word *buruk-
Meaning dust, soot
See also Proto-Altaic: *bŏru ‘dust, smoke, whirlwind’
Proto-Tungus: *bure-ki ‘dust’

Other words that might be of interest
*jalaŋ ‘field, steppe’, *jẹr ‘earth, land’, *topra-k ‘earth, soil’, *dāg ‘mountain’, *orman ‘forest’, *jüg- ‘upwards, to rise, hill, high’, *alan ‘level ground, plain’, *bạl- ‘mud, clay’