Where does “железнодорожный” come from?

железнодорожный (Russian) comes from Russian желе́зный, from Russian -ный, from Old Church Slavonic -ьнъ, from Proto-Slavic -ьnъ — -ish, -ic, -al, -ed; From adjectives.

железнодорожный (Russian): railroad, railway, rail

Definitions

  1. railroad, railway, rail

Ancestry of “железнодорожный”, step by step

железнодорожный traces back through two separate lines of ancestry.

via Russian желе́зный

StepLanguageWordMeaning
1Russianжеле́зныйiron
2Russian-ный-ish, -ic, -al, -ed
3Old Church Slavonic-ьнъish, -ic, -al, -ed
4Proto-Slavic-ьnъ-ish, -ic, -al, -ed; From adjectives

via Russian доро́га

StepLanguageWordMeaning
1Russianдоро́гаway; road
2Proto-Slavicdorgapath, road; way
3Proto-Indo-EuropeanderHgʰ-to tug, to stretch; to pluck
Every word from Proto-Slavic -ьnъ →Every word from Russian -ный →Every word from Old Church Slavonic -ьнъ →