English word invalid comes from Latin validus (Healthy, well. Strong. Valid. Worthy.), English in-
| Dictionary entry | Language | Definition |
|---|---|---|
| validus | Latin (lat) | Healthy, well. Strong. Valid. Worthy. |
| in- | English (en) | In, into (non-productive) Added to adjectives to mean not. (non-productive) Added to nouns to mean lacking or without. (non-productive) Used with certain words to reverse their meaning In, into, towards, within. |
| invalidus | Latin (lat) | Infirm, impotent, weak, feeble. |
| invalide | Middle French (frm) | |
| invalid | English (en) | (archaic) A disabled member of the armed forces; one unfit for active duty due to injury.. (dated, sometimes, offensive) A person who is confined to home or bed because of illness, disability or injury; one who is too sick or weak to care for themselves.. (dated, sometimes, offensive) Any person with a disability or illness. (British) To exempt from duty because of injury or ill health. [...] |