Where does “зрьно” come from?

зрьно (Old Church Slavonic) comes from Proto-Slavic zьrno, from Proto-Balto-Slavic *źírˀnan, from Proto-Indo-European ǵr̥h₂nóm, from Proto-Indo-European ǵr̥h₂nós, from Proto-Indo-European ǵerh₂- — to grow old, to mature.

зрьно (Old Church Slavonic): grain

Definitions

  1. grain

Ancestry of “зрьно”, step by step

StepLanguageWordMeaning
1Proto-Slaviczьrnograin
2Proto-Balto-Slavic*źírˀnangrain
3Proto-Indo-Europeanǵr̥h₂nómgrain
4Proto-Indo-Europeanǵr̥h₂nósmatured, grown old
5Proto-Indo-Europeanǵerh₂-to grow old, to mature
Every word from Proto-Indo-European ǵerh₂- →Every word from Proto-Indo-European ǵr̥h₂nós →Every word from Proto-Indo-European ǵr̥h₂nóm →