Where does “publik” come from?

publik (Polish) comes from German publik, from French public, from Latin pūblicus, from Old Latin poplicus, from Latin pōpulus, from Proto-Italic poplos — army.

Ancestry of “publik”, step by step

Step	Language	Word	Meaning
1	German	publik	publicly known, no longer private, secret
2	French	public	public; audience
3	Latin	pūblicus	of or belonging to the people, state, or community
4	Old Latin	poplicus	Alternative form of publicus
5	Latin	pōpulus	a people, nation
6	Proto-Italic	poplos	army

Every word from Proto-Italic poplos →Every word from Latin pōpulus →Every word from Old Latin poplicus →