Where does “septmъ” come from?

septmъ (Proto-Slavic) comes from Proto-Balto-Slavic septmas, from Proto-Indo-European septḿ̥ — seven.

Ancestry of “septmъ”, step by step

StepLanguageWordMeaning
1Proto-Balto-Slavicseptmas—
2Proto-Indo-Europeanseptḿ̥seven

Words derived from “septmъ”

Every word from Proto-Indo-European septḿ̥ →Every word from Proto-Balto-Slavic septmas →