Where does “восьмигранник” come from?

восьмигранник (Russian) comes from Russian восемь, from Old Church Slavonic осмь, from Proto-Slavic osmь, from Proto-Balto-Slavic aśmas, from Proto-Indo-European oḱtṓwos, from Proto-Indo-European oḱtṓw, from Proto-Indo-European aḱ- — sharp, pointed; sharp, pointed, edgy; sharp,...

восьмигранник (Russian): octahedron

Definitions

  1. octahedron

Ancestry of “восьмигранник”, step by step

восьмигранник traces back through two separate lines of ancestry.

via Russian восемь

StepLanguageWordMeaning
1Russianвосемьeight
2Old Church Slavonicосмьeight
3Proto-Slavicosmьeight
4Proto-Balto-Slavicaśmas—
5Proto-Indo-Europeanoḱtṓwoseighth
6Proto-Indo-Europeanoḱtṓweight
7Proto-Indo-Europeanaḱ-sharp, pointed; sharp, pointed, edgy; sharp,...

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 aḱ- →Every word from Proto-Indo-European oḱtṓw →Every word from Proto-Indo-European oḱtṓwos →