obstruct in WordNet English dictionary

1. block passage through
   "obstruct the path"
   obstruct  obturate  impede  occlude  jam  block  close up 
   
2. shut out from view or get in the way so as to hide from sight
   "The thick curtain blocked the action on the stage"; "The trees obstruct my view of the mountains"
   obstruct  block 
   
3. hinder or prevent the progress or accomplishment of
   "His brother blocked him at every turn"
   obstruct  blockade  block  hinder  stymie  stymy  embarrass