Where does “????” come from?

???? (Parthian) comes from Proto-Iranian widaHna-, from Proto-Indo-Iranian widaHna-.

Ancestry of “????”, step by step

StepLanguageWordMeaning
1Proto-IranianwidaHna-tent
2Proto-Indo-IranianwidaHna-—
Every word from Proto-Indo-Iranian widaHna- →Every word from Proto-Iranian widaHna- →