The word **辖区** is formed through the combination of two characters: **辖**, which historically means the linchpin of a chariot wheel (a crucial controlling device), and thus by extension means "to administer" or "to have jurisdiction over"; and **区**, which means "area" or "region". Together, they create a compound noun meaning "administered area" or "jurisdiction," conceptually referring to the geographical region under a specific authority's control or governance, much like the linchpin governs the movement of the wheel.