Where does “російсько-український” come from?

російсько-український (Ukrainian) comes from Ukrainian украї́нський, from Ukrainian Украї́на, from Old East Slavic Украина, from Russian Украи́на, from Slavic Оукраина, from Old East Slavic краи, from Proto-Slavic krajь, from Proto-Slavic krojiti — to sift, to separate.

російсько-український (Ukrainian): Of or pertaining to both Russia and Ukraine

Definitions

  1. Of or pertaining to both Russia and Ukraine

Ancestry of “російсько-український”, step by step

StepLanguageWordMeaning
1Ukrainianукраї́нськийUkrainian
2UkrainianУкраї́наa territory or a land along the border of a country
3Old East SlavicУкраина
4RussianУкраи́наUkraine
5SlavicОукраина
6Old East Slavicкраиedge; land, country
7Proto-Slavickrajьedge, end
8Proto-Slavickrojitito cut
9Proto-Balto-Slavickrájīˀtei
10Proto-Indo-Europeankroyh₁-eye-ti
11Proto-Indo-Europeankroyh₁-
12Proto-Indo-Europeankroh₁y-
13Proto-Indo-Europeankreh₁y-to sift, to separate
Every word from Proto-Indo-European kreh₁y-Every word from Proto-Indo-European kroh₁y-Every word from Proto-Indo-European kroyh₁-