Here are some examples of words derived from "polit":
* Politics: The activities associated with the governance of a country or other area, especially the debate or conflict among individuals or parties having or hoping to achieve power.
* Political: Relating to the government or the public affairs of a state, country, etc.
* Politician: A person who is professionally involved in politics, especially as a holder of or a candidate for an elected office.
* Police: A civil force responsible for maintaining order and enforcing the law.
* Policy: A course or principle of action adopted or proposed by a government, party, business, or individual.
* Polity: A form or process of civil government or constitution.
So, "polit" basically refers to things related to the organization and governance of a community.