There is a prefix "metro" which gives metropolis but as far as
suffix goes, polis is itself a suffix.
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Some words that begin with the prefix "metro" include metropolis (a large city), metropolitan (related to a city or its surrounding area), and metronome (a device that keeps musical time).
"metro" is a prefix derived from "metropolitan" meaning related to a large city or metropolis. When applied to words like "metrosexual," it refers to a style and identity associated with urban, sophisticated, and fashion-conscious individuals.