The verb obstruct has 3 senses (first 2 from tagged texts)
1. (2) obstruct, blockade, block, hinder, stymie, stymy, embarrass -- (hinder or prevent the progress or accomplishment of; "His brother blocked him at every turn")
2. (2) obstruct, obturate, impede, occlude, jam, block, close up -- (block passage through; "obstruct the path")
3. obstruct, block -- (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")