snag

noun

1. a piece, part, or point that sticks out, esp. one that is sharp or rough, as the broken end of a tree limb
2. ☆ an underwater tree stump or branch dangerous to navigation
3. a broken or irregular tooth
4. a small branch of an antler
5. 1. a break or tear, as in cloth, made by a splinter, snag, etc.
   2. a pulled thread in knitted material, causing a loop at the point where it is caught
6. ☆ an unexpected or hidden obstacle, difficulty, etc.

transitive verb snagged, snagging

1. to catch, tear, etc. on a snag
2. to impede with or as with a snag
3. ☆ to clear (a body of water) of snags
4. to catch or grab quickly

intransitive verb

1. ☆ to strike or become caught on a snag in water
2. to form or develop a snag