Where does “истинно” come from?

истинно (Russian) comes from Russian и́стинный, from Old East Slavic истиньнъ, from Old East Slavic -ьнъ, from Proto-Slavic -ьnъ — -ish, -ic, -al, -ed; From adjectives.

истинно (Russian): truly in accordance with the facts

Definitions

  1. truly in accordance with the facts

Ancestry of “истинно”, step by step

StepLanguageWordMeaning
1Russianи́стинныйveritable, true
2Old East Slavicистиньнъtrue
3Old East Slavic-ьнъish, -ic, -al, -ed
4Proto-Slavic-ьnъ-ish, -ic, -al, -ed; From adjectives
Every word from Proto-Slavic -ьnъ →Every word from Old East Slavic -ьнъ →Every word from Old East Slavic истиньнъ →