From earlier اوستاد (ustâd), from Middle Persian [Book Pahlavi needed] (ʾwstʾt'), 𐫀𐫇𐫏𐫘𐫤𐫀𐫅 (ʾwystʾd /⁠awestād⁠/, “master, craftsman”), from Proto-Iranian *Hawastātas (compare Avestan 𐬀𐬎𐬎𐬀𐬯𐬙𐬁𐬙𐬀 (auuastāta), Northern Kurdish hoste, oste, wista, wusta, وەستا (westa), Mazanderani استات (estât), استا (estâ), اسا (essâ)), verbal noun of Proto-Iranian *HawastaHyáti (compare Old Persian 𐎠𐎺𐎠𐎿𐎫𐎠𐎹𐎶 (a-v-a-s-t-a-y-m /⁠avāstāyam⁠/), Avestan 𐬀𐬎𐬎𐬀𐬯𐬙𐬀𐬌𐬌𐬀 (auuastaiia)), from *Hawa- (compare Avestan 𐬀𐬎𐬎𐬀 (auua)) + *staHyáti, from Proto-Indo-Iranian *Háwa + *staHyáti, the latter from Proto-Indo-European *stoh₂éyeti (“to cause to stand”).