PIE base ‘citadel, fortified high place’. See also pelə-¹.
Possible root of politics, police, cosmopolitan, and metropolis, from Greek polis ‘city, town; acropolis (citadel)’, although phonological development unclear. Cognate with Sanskrit pūr ‘fortress, citadel, town’.
[Pokorny *pel-1, pelə-, plē-’, p. 799.]
Glossary terms for this common ancestor to be added.