obstruct (
http://definr.com/obstruct)
v 1: hinder or prevent the progress or accomplishment of; "His
brother blocked him at every turn" [syn:
blockade,
block,
hinder,
stymie,
stymy,
embarrass]
2: block passage through; "obstruct the path" [syn:
obturate,
impede,
occlude,
jam,
block,
close up] [ant:
free]