Stenosis refers to the abnormal narrowing of a structure. This narrowing can occur in various parts of the body, such as blood vessels, the spine, or the digestive system. It can be caused by factors like inflammation, injury, or the buildup of plaque. The term "structure, narrowing" accurately describes the condition of stenosis, as it highlights both the affected structure and the narrowing that occurs. The other options, "suture" and "crushing," do not accurately describe stenosis.