To segregate or confine a group of people to a specific area, or to restrict something to a limited context or audience.
From ghetto plus the verb-forming suffix -ize (meaning 'to make or cause to be'). The suffix -ize comes from Greek via Latin and creates action verbs from nouns.
The -ize suffix is incredibly productive in English, but it's particularly powerful here because it transforms a place name into an action, making segregation feel like an intentional, deliberate act.
Complete word intelligence in one call. Free tier — 50 lookups/day.