Where does “ওস্তাদ” come from?
ওস্তাদ (Bengali) comes from Classical Persian استاد, from Middle Persian ʾwstʾt', from Proto-Iranian Hawastātas, from Proto-Iranian HawastaHyáti, from Proto-Iranian Hawa-.
ওস্তাদ (Bengali): teacher; ustad; tutor
Ancestry of “ওস্তাদ”, step by step