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Invalid

Definition

[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[adj] no longer valid; "the license is invalid"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

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Antonyms

valid