impairment

n. act of making worse; deterioration; handicap; defect, flaw

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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Impairment /im·pair·ment/ any abnormality of, partial or complete loss of, or loss of the function of, a body part, organ, or system. [more]Impairment - Community and Resources

Noun
1. the occurrence of a change for the worse
(synonym) damage, harm
(hypernym) change, alteration, modification
(hyponym) detriment, hurt
(derivation) impair
2. a symptom of reduced quality or strength
(synonym) deterioration
(hypernym) decay
(hyponym) corrosion
3. the condition of being unable to perform as a consequence of physical or mental unfitness; "reading disability"; "hearing impairment"
(synonym) disability, disablement, handicap
(hypernym) unfitness, poor shape, bad condition
(hyponym) bowleg, genu varum, tibia vara
4. damage that results in a reduction of strength or quality
(hypernym) damage, harm, hurt, scathe
(derivation) mar, impair, spoil, deflower, vitiate
5. the act of making something futile and useless (as by routine)
(synonym) stultification, constipation, deadening
(hypernym) degradation, debasement

(n.)
The state of being impaired; injury.