Where does “тринадцатигранник” come from?

тринадцатигранник (Russian) comes from Russian трина́дцать, from Russian три, from Macedonian трие, from Proto-Slavic trьje, from Proto-Balto-Slavic tríjes, from Proto-Indo-European *tréyes.

тринадцатигранник (Russian): tridecahedron

Definitions

  1. tridecahedron

Ancestry of “тринадцатигранник”, step by step

тринадцатигранник traces back through two separate lines of ancestry.

via Russian трина́дцать

StepLanguageWordMeaning
1Russianтрина́дцатьthirteen (13)
2Russianтриthree; second-person singular imperative...
3Macedonianтриеto rub
4Proto-Slavictrьjethree
5Proto-Balto-Slavictríjesthree
6Proto-Indo-European*tréyes—

via Russian грань

StepLanguageWordMeaning
1Russianграньface; facet, side; border, verge, brink
2Old East Slavicгрань—
3Proto-Slavicgranьside, edge
4Proto-Slavic-nьDeverbative, creates nouns
Every word from Proto-Indo-European *tréyes →Every word from Proto-Balto-Slavic tríjes →Every word from Proto-Slavic trьje →