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Verb: block off
  1. Obstruct access to
    - blockade
  2. Render unsuitable for passage
    "block off the streets";
    - barricade, block, blockade, stop, block up, bar
  3. Block off the passage through
    "We block off the valve";
    - shut off, close off

Derived forms: blocking off, blocks off, blocked off

Type of: block, close up, impede, jam, obstruct, obturate, occlude