Where does “убыва́ть” come from?

убыва́ть (Russian) comes from Russian убы́ть, from Russian быть, from Old East Slavic бꙑти, from Proto-Slavic *byti, from Proto-Balto-Slavic bū́ˀtei, from Proto-Indo-European bʰuH- — to become, grow, appear.

убыва́ть (Russian): to diminish, to decrease; (water) to become lower, to subside, to go down; (moon) to wane, to be on the wane

Definitions

  1. to diminish, to decrease; (water) to become lower, to subside, to go down; (moon) to wane, to be on the wane

Ancestry of “убыва́ть”, step by step

StepLanguageWordMeaning
1Russianубы́тьto diminish, to decrease; (water) to become lower, to subside, to go down; (moon) to wane, to be on the wane
2Russianбытьto be
3Old East Slavicбꙑтиto be
4Proto-Slavic*byti—
5Proto-Balto-Slavicbū́ˀteito be
6Proto-Indo-EuropeanbʰuH-to become, grow, appear

Words derived from “убыва́ть”

Every word from Proto-Indo-European bʰuH- →Every word from Proto-Balto-Slavic bū́ˀtei →Every word from Proto-Slavic *byti →