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un- +‎ clog


unclog (third-person singular simple present unclogs, present participle unclogging, simple past and past participle unclogged)

  1. (transitive) To remove a blockage from.
    • 2011, Billy Graham, The Holy Spirit: Activating God's Power in Your Life
      The arteries become clogged with substances that still baffle medical experts. They still do not know how to unclog these arteries so that the blood can have free flow.
  2. (intransitive) To have a blockage removed.