Impairment: Impairment refers to any condition or factor that limits or hinders an individual's ability to function normally in certain aspects of life.
Disability: Disability is a long-term physical, mental, intellectual, or sensory impairment that affects a person's ability to engage in daily activities.
Deficit: Deficit refers to a deficiency or inadequacy in a particular aspect, such as cognitive deficit which relates to impaired cognitive functioning.