Where does “озар” come from?

озар (Tajik) comes from Classical Persian آذَر, from Middle Persian 𐭭𐭥𐭥𐭠, from Proto-Iranian *HáHtr̥š, from Proto-Indo-Iranian *HáHtr̥š, from Proto-Indo-European h₂eh₁ter- — fire.

Ancestry of “озар”, step by step

StepLanguageWordMeaning
1Classical Persianآذَر—
2Middle Persian𐭭𐭥𐭥𐭠fire; Atar, holy fire
3Proto-Iranian*HáHtr̥šfire
4Proto-Indo-Iranian*HáHtr̥š—
5Proto-Indo-Europeanh₂eh₁ter-fire
Every word from Proto-Indo-European h₂eh₁ter- →Every word from Proto-Indo-Iranian *HáHtr̥š →Every word from Proto-Iranian *HáHtr̥š →