Where does “fra/ā-mōš” come from?

fra/ā-mōš (Middle Persian) comes from Proto-Iranian fra-, from Proto-Indo-Iranian pra-, from Proto-Indo-European pro-, from Proto-Indo-European por-, from Proto-Indo-European per-, from Proto-Indo-European pr̥tós — passed , crossed.

Ancestry of “fra/ā-mōš”, step by step

StepLanguageWordMeaning
1Proto-Iranianfra-toward, forward
2Proto-Indo-Iranianpra-toward, forward
3Proto-Indo-Europeanpro-toward, forward
4Proto-Indo-Europeanpor-to give birth; forward, through; going, passage
5Proto-Indo-Europeanper-before, in front; first; to go through
6Proto-Indo-Europeanpr̥tóspassed , crossed

Words derived from “fra/ā-mōš

Every word from Proto-Indo-European pr̥tósEvery word from Proto-Indo-European per-Every word from Proto-Indo-European por-