Where does “восьмилетний” come from?

восьмилетний (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,...

восьмилетний (Russian): eight-year

Definitions

  1. eight-year

Ancestry of “восьмилетний”, step by step

восьмилетний 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 ле́то

StepLanguageWordMeaning
1Russianле́тоyear; summer, year
2Old East Slavicлѣтоtime
3Proto-Slaviclětosummer; year
4Proto-Indo-Europeanleh₁tóm—
Every word from Proto-Indo-European aḱ- →Every word from Proto-Indo-European oḱtṓw →Every word from Proto-Indo-European oḱtṓwos →