What is the term for the obstruction of the intestine?

The term for the obstruction of the intestine is ileus. Ileus refers specifically to a condition characterized by a lack of movement in the intestines, which can lead to a blockage. It commonly results from a disruption in the normal peristaltic activity of the gastrointestinal tract, which can occur after surgery, from certain medications, an underlying illness, or mechanical obstructions.

In contrast, diverticulitis involves inflammation of diverticula in the colon and can cause complications but is not synonymous with an obstruction. Peritonitis refers to inflammation of the peritoneum, usually due to an infection or injury, and also does not specifically describe an obstruction. Colitis refers to inflammation of the colon, which might lead to symptoms similar to an obstruction but is fundamentally a different condition involving inflammation rather than a blockage. Thus, ileus is the correct term specifically associated with intestinal obstruction.