Which suffix means 'to box' in medical terminology?

The suffix that means 'to box' in medical terminology is derived from "capsul/o," which relates to a capsule. In medical terms, a capsule is a structure that often encases or surrounds another structure, much like how a box contains its contents. This concept is significant in various medical contexts, such as describing the protective sheaths found around certain organs or pathological structures.

The other choices refer to different anatomical or clinical concepts. "Burs/o" pertains to bursa, small fluid-filled sacs that reduce friction between tissues, particularly in joints, and does not imply a boxing or enclosing function. "Blephar/o" relates to the eyelid and involves different anatomical associations, while "brachi/o" refers to the arm, specifically the upper arm, which similarly does not convey a meaning of enclosure or boxing. Therefore, "capsul/o" is the correct choice, emphasizing the notion of enclosing or containing something within a defined space.