Where does “грань” come from?

грань (Old East Slavic) comes from Proto-Slavic granь, from Proto-Slavic -nь — Deverbative, creates nouns.

Ancestry of “грань”, step by step

StepLanguageWordMeaning
1Proto-Slavicgranьside, edge
2Proto-Slavic-nьDeverbative, creates nouns

Words derived from “грань

Every word from Proto-Slavic -nьEvery word from Proto-Slavic granь