What condition does the suffix "osis" often describe?

The suffix "osis" is commonly used in medical terminology to indicate a state or condition of something, particularly when referring to diseases or disorders. It often implies an abnormal or pathological state, rather than a specific "excess" or temporary state.

For instance, in terms like "neurosis," it denotes a condition affecting the nervous system that may indicate anxiety or other psychological issues. This usage highlights a particular state of health rather than a temporary situation or recovery. This is why identifying “a state of condition” is the most accurate recognition of the meaning of "osis," as it encapsulates the broader implications associated with various medical conditions.