oblast

Etymology

From a Slavic language, probably Russian о́бласть (óblastʹ, “region, province”), borrowed from Old Church Slavonic область (oblastĭ), from Proto-Slavic *obolstь, from earlier *obvolstь, *obvoldtь, a compound of *o(b)- (“over”) + *volstь (“rule, power, authority”), thus originally probably meaning "a region ruled over". Compare Proto-Slavic *obvoldati (“to rule”).