Where does “седмъ” come from?

седмъ (Old East Slavic) comes from Old Church Slavonic седмъ, from Proto-Slavic sedmъ, from Proto-Balto-Slavic septmas, from Proto-Indo-European septḿ̥ — seven.

седмъ (Old East Slavic): seventh

Definitions

  1. seventh

Ancestry of “седмъ”, step by step

StepLanguageWordMeaning
1Old Church Slavonicседмъ—
2Proto-Slavicsedmъseventh
3Proto-Balto-Slavicseptmas—
4Proto-Indo-Europeanseptḿ̥seven
Every word from Proto-Indo-European septḿ̥ →Every word from Proto-Balto-Slavic septmas →Every word from Proto-Slavic sedmъ →