snag 
(snăg)
(snăg)n.
1. A rough, sharp, or jagged protuberance, as:
a. A dead or partly dead tree that is still standing.
b. A tree or a part of a tree that is sunken in or protrudes above a body of water and is a danger to navigation.
c. A snaggletooth.
d. A short or imperfectly developed branch of a deer's antler.
2. A break, pull, or tear in fabric.
3. An unforeseen or hidden obstacle or difficulty: Our plans for the party have hit a snag.
v. snagged, snag·ging, snags
v.tr.
1. To tear, break, hinder, or destroy by or as if by a snag: snagged a stocking on a splinter.
2. Informal To catch or obtain quickly or unexpectedly: snagged a ground ball; snagged a bargain.
3. To free of snags: snagged the river.
4. To catch (a fish), especially by hooking in a place other than its mouth.
v.intr.
To be damaged by a snag: His sweater snagged on a tree branch.
[Of Scandinavian origin.]
snaggy adj.