invalid

nouns

someone who is incapacitated by a chronic illness or injury
invalid, shut-in

verbs

force to retire, remove from active duty, as of firemen
invalid
is a type of (narrower)
remove from a position or an office
remove
injure permanently
"He was disabled in a car accident"
disable, handicap, incapacitate, invalid

adjectives

having no cogency or legal force
"invalid reasoning"; "an invalid driver's license"
invalid
is derived from
invalidness
is derived from
invalidity
antonym
valid
is similar to
not capable of being collected
"a bad (or uncollectible) debt"
bad, uncollectible
is similar to
containing or based on a fallacy
"fallacious reasoning"; "an unsound argument"
fallacious, unsound
is similar to
erroneous and usually accidental
"a false start"; "a false alarm"
false
is similar to
deprived of legal force
invalidated, nullified
is similar to
lacking any legal or binding force
"null and void"
null, void
is similar to
plausible but misleading
sophistic, sophistical
see also
of marriages and offspring; not recognized as lawful
illegitimate
no longer valid
"the license is invalid"
invalid
is similar to
having come to an end or become void after passage of a period of time
"an expired passport"; "caught driving with an expired license"
expired