polis (n.)youdaoicibaDictYouDict[polis 词源字典]
"ancient Greek city-state," 1894, from Greek polis "city, one's city; the state, citizens," from PIE *pele- "citadel; enclosed space, often on high ground" (cognates: Sanskrit pur, puram "city, citadel," Lithuanian pilis "fortress").[polis etymology, polis origin, 英语词源]