Where does “źr̥Hnás” come from?

źr̥Hnás (Proto-Indo-Aryan) comes from Proto-Indo-Iranian ȷ́r̥Hnás, from Proto-Indo-European ǵr̥h₂-nó-s, from Proto-Indo-European ǵerh₂- — to grow old, to mature.

Ancestry of “źr̥Hnás”, step by step

StepLanguageWordMeaning
1Proto-Indo-Iranianȷ́r̥Hnás
2Proto-Indo-Europeanǵr̥h₂-nó-s
3Proto-Indo-Europeanǵerh₂-to grow old, to mature
Every word from Proto-Indo-European ǵerh₂-Every word from Proto-Indo-European ǵr̥h₂-nó-sEvery word from Proto-Indo-Iranian ȷ́r̥Hnás