From Proto-Indo-Iranian *ćáHstā (“commander, ruler; teacher”), from Proto-Indo-European *ḱéh₁s-tōr, from *ḱeh₁s- (“to command, rule, instruct, teach”). Cognate with Sanskrit शास्तर् (śāstar).
𐬯𐬁𐬯𐬙𐬀𐬭 • (sāstar) m