Impairment is the thing about the individual that is different, affecting their appearance or how they function and possibly causing difficulties such as pain or fatigue.
Nam yw'r peth am yr unigolyn sy'n wahanol, sy'n effeithio ar ei ymddangosiad neu sut maen nhw'n gweithredu ac o bosibl yn achosi anawsterau fel poen neu flinder.