Proto-Tungus-Manchu: *bū-
Meaning: to shade (light)
Russian meaning: заслонять свет
Evenki: bū-
Comments: ТМС 1, 99. Cf. perhaps also: Evk. boro 'dusk'; Manchu boro 'hat (made of straw)' (see ТМС 1, 96). A possible derivative is also *bō-gda 'hat; upper clothes' (ТМС 1, 87).