Where does “купа” come from?
купа (Russian) comes from Old East Slavic купа, from Proto-Slavic kupa, from Proto-Indo-European keup-, from Proto-Indo-European keu- — bend; vault, hole; to shine; light; bright.
Ancestry of “купа”, step by step
| Step | Language | Word | Meaning |
|---|
| 1 | Old East Slavic | купа | — |
| 2 | Proto-Slavic | kupa | — |
| 3 | Proto-Indo-European | keup- | to arch, bend, buckle; a hollow |
| 4 | Proto-Indo-European | keu- | bend; vault, hole; to shine; light; bright |