Where does “убыточный” come from?
убыточный (Russian) comes from Russian убы́ток, 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.
Ancestry of “убыточный”, step by step
| Step | Language | Word | Meaning |
|---|
| 1 | Russian | убы́ток | — |
| 2 | Russian | убы́ть | — |
| 3 | Russian | быть | to be |
| 4 | Old East Slavic | бꙑти | to be |
| 5 | Proto-Slavic | *byti | — |
| 6 | Proto-Balto-Slavic | bū́ˀtei | to be |
| 7 | Proto-Indo-European | bʰuH- | to become, grow, appear |