Where does “о” come from?
о (Old East Slavic) comes from Proto-Slavic o(b), from Proto-Balto-Slavic ab, from Proto-Indo-European h₃ebʰi.
Ancestry of “о”, step by step
| Step | Language | Word | Meaning |
|---|
| 1 | Proto-Slavic | o(b) | around, about; concerning; against, on |
| 2 | Proto-Balto-Slavic | ab | — |
| 3 | Proto-Indo-European | h₃ebʰi | — |