Where does “pratm̥más” come from?

pratm̥más (Proto-Indo-Iranian) comes from Proto-Indo-European pro-tm̥mós, from Proto-Indo-European pro-, from Proto-Indo-European por-, from Proto-Indo-European per-, from Proto-Indo-European pr̥tós — passed , crossed.

Ancestry of “pratm̥más”, step by step

StepLanguageWordMeaning
1Proto-Indo-Europeanpro-tm̥mós
2Proto-Indo-Europeanpro-toward, forward
3Proto-Indo-Europeanpor-to give birth; forward, through; going, passage
4Proto-Indo-Europeanper-before, in front; first; to go through
5Proto-Indo-Europeanpr̥tóspassed , crossed
Every word from Proto-Indo-European pr̥tósEvery word from Proto-Indo-European per-Every word from Proto-Indo-European por-