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Verb: deplatform  dee-'plat-form
  1. Block someone's ability to contribute post a debate or (esp. online) platform, e.g. because of use of hate speech, inciting violence, violation of terms of service, etc.
    "The social media company deplatformed the user for repeatedly spreading misinformation"

Derived forms: deplatformed, deplatforming, deplatforms

Encyclopedia: Deplatform