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Verb: illegalize  i'lee-gu,lIz
  1. Declare illegal; ban
    "Marijuana is illegalized in the U.S.";
    - outlaw, criminalize, criminalise [Brit], illegalise [Brit]

Derived forms: illegalized, illegalizes, illegalizing

Type of: disallow, forbid, interdict, nix [N. Amer, informal], prohibit, proscribe, veto