invadiatus (in-vay-dee-ay-t<<schwa>>s). [Law Latin] Hist. A person who is under a pledge. INVALID
invalid (in-val-id), adj.1. Not legally binding <an invalid contract>.2. Without basis in fact <invalid allegations>.
invalid (in-v<<schwa>>-lid), n. A person who, because of serious illness or other disability, lacks the physical or mental capability of managing his or her day-to-day life. [Cases: Guardian and Ward 9.5; Mental Health 3. C.J.S. Insane Persons§§ 2, 6.]
[Blacks Law 8th]