Where does “двенадцатигранник” come from?

двенадцатигранник (Russian) comes from Russian грань, from Old East Slavic грань, from Proto-Slavic granь, from Proto-Slavic -nь — Deverbative, creates nouns.

двенадцатигранник (Russian): dodecahedron

Definitions

  1. dodecahedron

Ancestry of “двенадцатигранник”, step by step

двенадцатигранник traces back through two separate lines of ancestry.

via Russian грань

StepLanguageWordMeaning
1Russianграньface; facet, side; border, verge, brink
2Old East Slavicгрань
3Proto-Slavicgranьside, edge
4Proto-Slavic-nьDeverbative, creates nouns

via Russian двена́дцать

StepLanguageWordMeaning
1Russianдвена́дцатьtwelve (12)
2Russian-надцать-teen, "suffix forming cardinal numbers from...
Every word from Proto-Slavic -nьEvery word from Proto-Slavic granьEvery word from Old East Slavic грань
двенадцатигранник — Etymology, Origin & Word History | Etymology Explorer