Where does “убы́ть” come from?
убы́ть (Russian) comes 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.
Ancestry of “убы́ть”, step by step
| Step | Language | Word | Meaning |
|---|
| 1 | Russian | быть | to be |
| 2 | Old East Slavic | бꙑти | to be |
| 3 | Proto-Slavic | *byti | — |
| 4 | Proto-Balto-Slavic | bū́ˀtei | to be |
| 5 | Proto-Indo-European | bʰuH- | to become, grow, appear |