What is the Medical term meaning inability to understand written or spoken words?

The medical term for the inability to understand written or spoken words is alexia. Alexia can be caused by a variety of conditions, including stroke, brain injury, or dementia. It can also be a symptom of developmental disorders such as dyslexia. Alexia can range in severity from mild to severe, and can affect only one language or multiple languages. Treatment for alexia typically involves speech therapy and other therapies designed to help people learn to read and understand words again.