Barbarian

From Metapedia

Barbarian refers to a non-Greek or non-Roman individual or tribe whose culture and level of civilization was seen at the time as being inferior. The Greeks used the term as they encountered scores of different foreign cultures, including the Thracians, Egyptians, Persians, Indians, Celts, Germans, Phoenicians, Etruscans, Romans, and Carthaginians.

Later the Romans would us the term against various tribes, largely Germanic, outside of their direct control.