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Verb: impede  im'peed
  1. Be a hindrance or obstacle to
    "She is impeding the progress of our project";
    - hinder, fetter [literary], entrammel [literary], trammel [literary]
  2. Block passage through
    "impede the path";
    - obstruct, obturate, occlude, jam, block, close up

Derived forms: impeding, impedes, impeded

Type of: keep, prevent