What does the suffix "-phasia" refer to in medical terminology?

The suffix "-phasia" is derived from the Greek word meaning "speech" or "to speak." In medical terminology, it specifically refers to disorders of speech and language. For example, terms like "aphasia" denote a condition characterized by the inability to speak due to brain injury or other medical issues affecting communication. This makes it clear that when "-phasia" is used in a medical context, it is directly related to aspects of speech or language, thereby validating the choice of "speech" as the correct answer. Understanding this term is crucial for healthcare professionals who might encounter patients with speech-related disorders, enabling them to accurately assess and provide appropriate care.