What does the suffix '-pnea' specifically refer to in a medical setting?

The suffix '-pnea' specifically refers to breathing in a medical context. It is derived from the Greek word "pnoia," which means breathing. This suffix is commonly used in various medical terms to describe different types of breathing patterns or conditions associated with respiration. For example, terms like "tachypnea" refer to rapid breathing, while "dyspnea" indicates difficulty in breathing. Understanding this suffix is essential for interpreting many medical terminologies related to respiratory health.

The other options do not relate to breathing: the suffix for spitting pertains to expectoration, the term concerning a meal relates to nutrition or digestion, and the term for pressure is typically represented by a different suffix, such as '-tension' or '-pressure.'