Chuvash language
The definition of the term "hisar" is similar to that of castle, a fortified structure that acts as a residance, such as Rumelihisarı or Anadoluhisarı. Another word used for forts, "kermen", originates from the Cuman language. It is known in Tatar language as "kirmen", and "karman" in Chuvash language. The Russian word "kremlin" also originates from "kermen".