usurper
n. தகாமுறை அரசர், அடாவழி உரிமை கைப்பற்றுபவர்.
U*surp"er, n. Defn: One who usurps; especially, one who seizes illegally on sovereign power; as, the usurper of a throne, of power, or of the rights of a patron. A crown will not want pretenders to claim it, not usurpers, if their power serves them, to possess it. South.