Where does “западнославянский” come from?

западнославянский (Russian) comes from Russian за́падный, from Russian за́пад, from Old East Slavic западъ, from Proto-Slavic *zapadъ, from Proto-Slavic pastì, from Proto-Balto-Slavic pṓˀstei, from Proto-Indo-European pēd-, from Proto-Indo-European ped- — to walk, to step; to stumble, to fall.

западнославянский (Russian): West Slavic relating to the West Slavs

Definitions

  1. West Slavic relating to the West Slavs

Ancestry of “западнославянский”, step by step

западнославянский traces back through two separate lines of ancestry.

via Russian за́падный

StepLanguageWordMeaning
1Russianза́падныйWestern
2Russianза́падwest
3Old East Slavicзападъsunset
4Proto-Slavic*zapadъsunset
5Proto-Slavicpastìto pasture
6Proto-Balto-Slavicpṓˀstei
7Proto-Indo-Europeanpēd-foot
8Proto-Indo-Europeanped-to walk, to step; to stumble, to fall

via Russian славя́нский

StepLanguageWordMeaning
1Russianславя́нскийSlav, Slavic
2Proto-SlavicslověnьskъSlavic
3Proto-SlavicslověninъSlav
4Proto-Slavicslovoword
5Proto-Balto-Slavicślawas
6Proto-Indo-Europeanḱléwosfame
7Proto-Indo-Europeanḱlew-to hear
8Proto-Indo-Europeanḱel-to cover; to incline
Every word from Proto-Indo-European ped-Every word from Proto-Indo-European pēd-Every word from Proto-Balto-Slavic pṓˀstei