Where does “čo” come from?
čo (Slovak) comes from Proto-Slavic česo, from Proto-Slavic čь, from Proto-Balto-Slavic ki, from Proto-Indo-European kʷíd, from Proto-Indo-European kʷís, from Proto-Indo-European kʷi- — interrogative base.
čo (Slovak): what
Ancestry of “čo”, step by step
| Step | Language | Word | Meaning |
|---|
| 1 | Proto-Slavic | česo | — |
| 2 | Proto-Slavic | čь | what; alternative form of *čьto |
| 3 | Proto-Balto-Slavic | ki | what |
| 4 | Proto-Indo-European | kʷíd | neuter nominative/accusative singular of *kʷís |
| 5 | Proto-Indo-European | kʷís | who, what; who, which, that; which, what |
| 6 | Proto-Indo-European | kʷi- | interrogative base |