Where does “прогерия” come from?

прогерия (Russian) comes from Ancient Greek γῆρας, from Proto-Indo-European ǵērh₂-s, from Proto-Indo-European ǵerh₂- — to grow old, to mature.

Ancestry of “прогерия”, step by step

StepLanguageWordMeaning
1Ancient Greekγῆραςold age
2Proto-Indo-Europeanǵērh₂-s—
3Proto-Indo-Europeanǵerh₂-to grow old, to mature
Every word from Proto-Indo-European ǵerh₂- →Every word from Proto-Indo-European ǵērh₂-s →Every word from Ancient Greek γῆρας →