Where does “восемнадцатилетний” come from?

восемнадцатилетний (Russian) comes from Russian восемна́дцать, 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,...

восемнадцатилетний (Russian): eighteen-year

Definitions

  1. eighteen-year

Ancestry of “восемнадцатилетний”, step by step

восемнадцатилетний traces back through two separate lines of ancestry.

via Russian восемна́дцать

StepLanguageWordMeaning
1Russianвосемна́дцатьeighteen (18)
2Russianвосемьeight
3Old Church Slavonicосмьeight
4Proto-Slavicosmьeight
5Proto-Balto-Slavicaśmas
6Proto-Indo-Europeanoḱtṓwoseighth
7Proto-Indo-Europeanoḱtṓweight
8Proto-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 oḱtṓwEvery word from Proto-Indo-European oḱtṓwos