From Middle Persian plystk' (frēstag, “apostle; angel”) [Inscriptional Pahlavi needed] (plystky, “messenger”). Compare Manichaean Middle Persian frystg, prystg (frēstag), hrystg (hrēstag, “apostle; angle”), Manichaean Parthian fryštg (frēštag, “apostle; angel”), Avestan 𐬟𐬭𐬀𐬉𐬱𐬙𐬀- (fraēšta-, “messenger”), Sanskrit प्रेष्यता (preṣyatā); Middle Iranian borrowings Old Armenian հրեշտակ (hreštak), Jewish Babylonian Aramaic פרסתקא (prestəqāʾ, “royal guard, messenger”), and Classical Syriac ܦܪܣܬܩܐ (prestəqāʾ, “royal guard, messenger”).