Reconstruction:Proto-Slavic/ajьčьnъ

From *ājьce +‎ *-ьnъ, ultimately from *ȃje (“egg”) +‎ *-ьce. From Proto-Balto-Slavic *ṓja (“egg”), from Proto-Indo-European *h₂ōwyóm (“egg”).

*ājьčьnъ

• *ājьčьnica
• *ājьčьnikъ

• East Slavic:
  • Russian: яи́чный (jaíčnyj, “from egg”)
  • Ukrainian: яє́шний (jajéšnyj), яє́чний (jajéčnyj, “from egg”)
• South Slavic:
  • Bulgarian: я́йчен (jájčen, “from egg”)
  • Macedonian: јајчен (jajčen)
  • Serbo-Croatian:

    Cyrillic: јајчан, јајчен

    Latin: јaјčan, јaјčen

  • Slovene: jájčen (“from egg”)
• West Slavic:
  • Czech: vaječný (“from egg”)
  • Polish: jajeczny (“from egg”)
  • Slovak: vaječný (“from egg”)

• Trubachyov, Oleg, editor (1974), “*ajьčьnъjь”, in Этимологический словарь славянских языков [Etymological Dictionary of Slavic Languages] (in Russian), issue 1 (*a – *besědьlivъ), Moscow: Nauka, page 64