Where does “огнеупорный” come from?

огнеупорный (Russian) comes from Russian огонь, from Old East Slavic огнь, from Proto-Slavic ogňь, from Proto-Balto-Slavic ungnis, from Proto-Indo-European h₁n̥gʷnis, from Proto-Indo-European h₁engʷ- — to burn; fire.

огнеупорный (Russian): refractory, fire-resistant

Definitions

  1. refractory, fire-resistant

Ancestry of “огнеупорный”, step by step

огнеупорный traces back through two separate lines of ancestry.

via Russian огонь

StepLanguageWordMeaning
1Russianогоньfire; light; weapons fire
2Old East Slavicогньfire
3Proto-Slavicogňьfire
4Proto-Balto-Slavicungnisfire
5Proto-Indo-Europeanh₁n̥gʷnisfire
6Proto-Indo-Europeanh₁engʷ-to burn; fire

via Russian упо́рный

StepLanguageWordMeaning
1Russianупо́рныйpersistent, insistent
2Russian-ный-ish, -ic, -al, -ed
3Old Church Slavonic-ьнъish, -ic, -al, -ed
4Proto-Slavic-ьnъ-ish, -ic, -al, -ed; From adjectives
Every word from Proto-Indo-European h₁engʷ- →Every word from Proto-Indo-European h₁n̥gʷnis →Every word from Proto-Balto-Slavic ungnis →