Prefixes:
* Metro-: Meaning "great" or "large" (e.g., metropolis: a large city)
* Cosmo-: Meaning "universe" or "world" (e.g., cosmopolitan: a person who is at home in all parts of the world)
* Neo-: Meaning "new" (e.g., neopolis: a new city)
* Pan-: Meaning "all" (e.g., panpolis: a union of cities)
Suffixes:
* -ian: Indicating origin or belonging (e.g., Athenian: a person from Athens)
* -ite: Indicating origin or belonging (e.g., polite: a person from a city-state)
* -ical: Indicating a characteristic or quality (e.g., political: relating to government or the state)
* -ization: Indicating the process of becoming something (e.g., urbanization: the process of becoming urban)
These are just a few examples, and there are many other prefixes and suffixes that can be combined with "polis" to create new words. The specific prefix or suffix that you use will depend on the meaning that you want to convey.