Where does “вънутрьнии” come from?

вънутрьнии (Old East Slavic) comes from Proto-Slavic vъnǫtrьnъ, from Proto-Slavic -ьnъ — -ish, -ic, -al, -ed; From adjectives.

Ancestry of “вънутрьнии”, step by step

StepLanguageWordMeaning
1Proto-Slavicvъnǫtrьnъinterior, inner
2Proto-Slavic-ьnъ-ish, -ic, -al, -ed; From adjectives

Words derived from “вънутрьнии”

Every word from Proto-Slavic -ьnъ →Every word from Proto-Slavic vъnǫtrьnъ →