Where does “восьмидневный” come from?

восьмидневный (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,...

восьмидневный (Russian): eight-day

Definitions

  1. eight-day

Ancestry of “восьмидневный”, step by step

восьмидневный 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 день

StepLanguageWordMeaning
1Russianденьday, daytime; afternoon, early evening;...
2Old East Slavicдьньday
3Proto-Slavicdь̑nьday
Every word from Proto-Indo-European aḱ- →Every word from Proto-Indo-European oḱtṓw →Every word from Proto-Indo-European oḱtṓwos →