Where does “prátʰas” come from?

prátʰas (Proto-Indo-Aryan) comes from Proto-Indo-Iranian prátʰas, from Proto-Indo-European pléth₂os, from Proto-Indo-European pleth₂- — flat.

Ancestry of “prátʰas”, step by step

StepLanguageWordMeaning
1Proto-Indo-Iranianprátʰasbreadth, extension, width
2Proto-Indo-Europeanpléth₂osbreadth
3Proto-Indo-Europeanpleth₂-flat
Every word from Proto-Indo-European pleth₂- →Every word from Proto-Indo-European pléth₂os →Every word from Proto-Indo-Iranian prátʰas →