դաշտան (Armenian) comes from Old Armenian դաշտան, from Middle Persian dštʾn', from Middle Persian -stʾn', from Old Persian 𐎿𐎫𐎠𐎴, from Proto-Iranian stā́nam, from Proto-Indo-Iranian stʰáHnam, from Proto-Indo-European *steh₂-.
դաշտան (Armenian): menstruation