Uncollectible
Part of speech: adjective
Definition: That cannot be collected.
Invalid
Part of speech: adjective
Definition: Not valid; not true, correct, acceptable or appropriate.Intended for use by an invalid.
Part of speech: verb
Definition: To exempt from duty because of injury or ill health.
Part of speech: noun
Definition: One who is confined to home or bed because of illness, disability or injuryAny person with a disability.
Example sentence: Every invalid is a prisoner.