Where does “естъ” come from?
естъ (Old Church Slavonic) comes from Old Church Slavonic бꙑти, from Proto-Slavic *byti, from Proto-Balto-Slavic bū́ˀtei, from Proto-Indo-European bʰuH- — to become, grow, appear.
естъ (Old Church Slavonic): Alternative form of ѥстъ
Ancestry of “естъ”, step by step
| Step | Language | Word | Meaning |
|---|
| 1 | Old Church Slavonic | бꙑти | to be |
| 2 | Proto-Slavic | *byti | — |
| 3 | Proto-Balto-Slavic | bū́ˀtei | to be |
| 4 | Proto-Indo-European | bʰuH- | to become, grow, appear |