Impaired

adj. damaged, weakened, adversely affected

v. spoil, mar, damage, weaken

A disability is a condition or function judged to be significantly impaired relative to the usual standard of an individual or their group. The term is often used to refer to individual functioning, including physical impairment, sensory impairment, cognitive impairment, intellectual impairment mental illness, and various types of chronic disease. This usage is associated with a medical model of disability. The human rights or social model focuses on functioning as an interaction between a person and their environment, highlighting the role of a society in labelling, causing or maintaining disability within that society, including through attitudes or accessibility favoring the majority. Disabilities may come to people during their life or people may be born disabled.
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Adjective
1. diminished in strength, quality, or utility; "impaired eyesight"
(antonym) unimpaired
(similar) anosmic
(see-also) damaged
2. mentally or physically unfit
(synonym) afflicted
(similar) unfit

Verb
1. make worse or less effective; "His vision was impaired"
(hypernym) damage
(derivation) damage, harm, impairment
2. make imperfect; "nothing marred her beauty"
(synonym) mar, spoil, deflower, vitiate
(hypernym) damage
(hyponym) defile, sully, corrupt, taint, cloud
(derivation) impairment

(imp. & p. p.)
of Impair
  

A deterioration of an individual’s judgment and decrease in his or her’s physical ability. Used primarily in criminal law; driving under the influence of alcohol or disability law in regards to a person’s physical or mental impairment. - (read more on Impaired)