Mahadevan's sign number 284 has two possible readings, each of which gives us the noun city.
Firstly, there are four structures, which can be read as a pictograph of buildings interspersed with roads. The buildings are located inside a perimeter wall.
Secondly, there is an ideograph of four voices inside a perimeter wall. In Chinese, four voices is the character jí 㗊, meaning a clamour.