When the word pariah was first used in the English language in a 1613 volume by Samuel Purchas, it had a very specific definition of "ceremonial drummer". This is connected to the modern meaning because drummers at southern Indian festivals were often of the lowest caste, and the term began to be associated with "untouchables", who were shunned by society as social outcasts. Finally, by the early nineteenth century, pariah came to refer to outcasts of any time, losing association with its Indian roots. Speaking of those roots, the word is believed to come from either Tamil paraiyar (a conjugation of parai, or "drum") or Malayalam parayan (from para, also "drum"). There is no evidence going any further back, but since those languages are Dravidian, it can be assumed that the word has no Indo-European origin.
Hello! I'm Adam Aleksic. This year, I graduated from Harvard University with a degree in Government and Linguistics. There, I co-founded the Harvard Undergraduate Linguistics Society and wrote a thesis on Serbo-Croatian language policy, magna cum laude. In addition to etymology, I also really enjoy philosophy, trivia, vexillology, geography, board games, conlanging, art history, and law.