Present participle of ghettoize; the ongoing process of segregating or restricting something to a limited context.
From ghettoize plus the gerund suffix -ing. This form emphasizes the continuous, active nature of the segregation process.
The -ing form makes segregation sound like a continuous threat or process, which is why activists and scholars use phrases like 'the ghettoizing of [communities]' to emphasize it's ongoing, not finished.
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