[n] someone who is incapacitated by a chronic illness or injury
[adj] no longer valid; "the license is invalid"
[adj] having no cogency or legal force; "invalid reasoning"; "an invalid driver's license"
[v] injure permanently; "He was disabled in a car accident"
[v] force to retire, remove from active duty, as of firemen
bad, disable, expired, fallacious, false, handicap, incapacitate, invalidated, null, nullified, shut-in, sophistic, sophistical, specious, spurious, uncollectible, unsound, void