Where does “атр” come from?

атр (Ossetian) comes from Proto-Iranian *HáHtr̥š, from Proto-Indo-Iranian *HáHtr̥š, from Proto-Indo-European h₂eh₁ter- — fire.

Ancestry of “атр”, step by step

StepLanguageWordMeaning
1Proto-Iranian*HáHtr̥šfire
2Proto-Indo-Iranian*HáHtr̥š—
3Proto-Indo-Europeanh₂eh₁ter-fire

Words derived from “атр”

Every word from Proto-Indo-European h₂eh₁ter- →Every word from Proto-Indo-Iranian *HáHtr̥š →Every word from Proto-Iranian *HáHtr̥š →