invalid
in-val-id
verb
To remove someone from active service or employment because of illness or injury.
"He was invalided out of the army after being wounded."
adjective
Not valid; without force or effect; not legally binding.
"The contract was declared invalid due to a technicality."
noun
A person made weak or disabled by illness or injury.
"He spent his days caring for his invalid mother."
Thesaurus
Synonyms: shut-in, incapacitate, disable, handicap, sophistic, invalidated, null, false, spurious, uncollectible, nullified, unsound
Antonyms: valid