Where does “како” come from?
како (Old East Slavic) comes from Proto-Slavic kako, from Proto-Slavic kakъ, from Proto-Balto-Slavic *kōkos.
Ancestry of “како”, step by step
| Step | Language | Word | Meaning |
|---|
| 1 | Proto-Slavic | kako | how, in which way |
| 2 | Proto-Slavic | kakъ | of what/which kind |
| 3 | Proto-Balto-Slavic | *kōkos | — |