Russian word семь comes from Proto-Slavic *sedmъ (Seventh.), Proto-Indo-European *septḿ̥ (Seven.)
| Dictionary entry | Language | Definition |
|---|---|---|
| *sedmъ | Proto-Slavic (sla-pro) | Seventh. |
| *septḿ̥ | Proto-Indo-European (ine-pro) | Seven. |
| *septim | Proto-Balto-Slavic (ine-bsl-pro) | |
| *setь | Proto-Slavic (sla-pro) | |
| семь | Russian (rus) | Seven (7). |