What suffix would you use to denote a spasm or contraction?

The suffix that denotes a spasm or contraction is indeed found in the term "-ism." This suffix is often used in medical terminology to describe a condition, particularly one that involves abnormal states or processes. For instance, "hypertonism" refers to an excessive tone or tension in muscles, which directly relates to spasms or contractions.

Understanding the context of other suffixes helps clarify why "-ism" is the appropriate choice. The suffix "-otomy" signifies a surgical incision into a body part, which does not relate to spasms. On the other hand, "-itis" indicates inflammation, a separate medical condition. Lastly, "-lysis" refers to the breakdown or destruction of cells or tissues, which is not applicable to the concept of spasms or contractions. Thus, in this context, "-ism" correctly identifies a state related to muscle tension or activity.