Postencephalitic Parkinson Disease (PEPD) has no antonyms, as it is a specific medical condition. However, Parkinson's Disease, of which PEPD is a rare subtype, has several antonyms which relate to movement and mobility. These include agility, coordination, dexterity, suppleness, and fluency. Parkinson's Disease is a neurological disorder which progressively hinders fine motor skills and movements, making it difficult for those affected to perform everyday functions such as walking, writing, or even speaking. Antagonistic treatments, such as physical therapy and medication, can help manage symptoms and improve mobility. Counseling and support services can also aid patients and their families in adjusting to the effects of the disease.