Where does “زر” come from?

زر (Classical Persian) comes from Middle Persian zarr, from Parthian zarn, from Proto-Iranian jr̥Hanyam, from Proto-Indo-Iranian ȷ́ʰr̥Hanyam, from Proto-Indo-European ǵʰl̥h₃enyom, from Proto-Indo-European ǵʰelh₃- — to flourish; green, yellow.

Ancestry of “زر”, step by step

StepLanguageWordMeaning
1Middle Persianzarrgold
2Parthianzarngold
3Proto-Iranianjr̥Hanyamgold
4Proto-Indo-Iranianȷ́ʰr̥Hanyamgold
5Proto-Indo-Europeanǵʰl̥h₃enyom
6Proto-Indo-Europeanǵʰelh₃-to flourish; green, yellow
Every word from Proto-Indo-European ǵʰelh₃-Every word from Proto-Indo-European ǵʰl̥h₃enyomEvery word from Proto-Indo-Iranian ȷ́ʰr̥Hanyam