Where does “первооснова” come from?

первооснова (Russian) comes from Russian осно́ва, from Old East Slavic основа, from Proto-Slavic osnova — basis, foundation.

первооснова (Russian): fundamental principle

Definitions

  1. fundamental principle

Ancestry of “первооснова”, step by step

первооснова traces back through two separate lines of ancestry.

via Russian осно́ва

StepLanguageWordMeaning
1Russianосно́ваbasis, foundation
2Old East Slavicоснова—
3Proto-Slavicosnovabasis, foundation

via Russian пе́рвый

StepLanguageWordMeaning
1Russianпе́рвыйfirst
Every word from Proto-Slavic osnova →Every word from Old East Slavic основа →Every word from Russian осно́ва →