[in.val.id] adj [L invalidus weak, fr. in- + validus strong--more at valid] (1542): not valid: a: being without foundation or force in fact, truth, or law b: logically inconsequent -- in.val.id.ly adv
[2]in.va.lid adj [L & F; F invalide, fr. L invalidus] (1642) 1: suffering from disease or disability: sickly
2: of, relating to, or suited to one that is sick [3]invalid n (1709): one that is sickly or disabled [4]in.va.lid vt (1787) 1: to remove from active duty by reason of sickness or disability
2: to make sickly or disabled