Obstruction (noun)

1. An obstacle or hindrance that blocks or slows down progress.
2. A blockage or impediment in a path, pipe, or passageway.
3. The act of blocking or hindering something.

Origin:

From latin obstructionem (a blocking, an obstacle), from obstruere (to block, to close up).

Examples:

1. The construction work caused an obstruction on the highway.
2. The obstruction in the pipe caused the water to back up.
3. The obstruction in the airway made it difficult for the patient to breathe.
4. The obstruction in the process caused a delay in the project.
5. The obstruction of justice was a serious crime that carried severe penalties.