+van

borít, takar : Tung. *bū-; Mong. *bürü-; Turk. *bürü-. [to cover, shade]

felborít, borul: Tung. *bur-; Mong. *burči-; Jpn. *bar-. [to break, crush]

boru : Tung. *bure-ki; Mong. *bur-gi- /*bür-gi-; Turk. *bur-uk; Kor. *pằrằ-m. [dust; smoke, whirlwind]