What term was used to describe the person, who is a barbarian or out caste?

The term "Mlechchha" (or Mleccha) was used in ancient and medieval India to describe foreigners, barbarians, or people considered outside the traditional caste system. This Sanskrit term was applied to those who did not follow Hindu social and religious norms. Other options like Nambardar (village headman), Tehsildar (revenue officer), and Subedar (administrative head) are official administrative positions within the social hierarchy.