metropolis
noun
[ mɪˈtrɒp(ə)lɪs ]
• the capital or chief city of a country or region.
• "he preferred the peaceful life of the countryside to the bustle of the metropolis"
Origin:
late Middle English (denoting the see of a metropolitan bishop): via late Latin from Greek mētropolis ‘mother state’, from mētēr, mētr- ‘mother’ + polis ‘city’.