impaired

(verb) make worse or less effective. Synonyms: impair. Example: "His vision was impaired."

(verb) make imperfect. Synonyms: mar, impair, spoil, deflower, vitiate. Example: "Nothing marred her beauty."

(adj) diminished in strength, quality, or utility. Synonyms: impaired (vs. unimpaired). Example: "Impaired eyesight."

(adj) mentally or physically unfit. Synonyms: afflicted.