The Proto-Altaic word *biălu
Word *biălu
Meaning dirt, mud
See also Proto-Turkic: *bạl- ‘mud, clay’
Synonyms *bằt῾í

Other words that might be of interest
*bŏru ‘dust, smoke, whirlwind’, *pʰāla ‘field, level ground’, *tīdu ‘elevated ground, hill, mountain’