WordWeb Online

1. Made difficult or slow
   "we blamed our impeded progress on lack of money"

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

See also: obstructed

Type of: keep, prevent