invalid
$ \mathrm{invalid}^1 |ˈinvələd|
https://gyazo.com/c2858b015bf09b832b1c88e5500d1087
source: アルプスの少女ハイジ　くらら　クララ　車椅子　くるまいす GIF - Clara Anime WheelChair - Discover & Share GIFs
noun
a person made weak or disabled by illness or injury:
(介護を要する)病弱者, 病人, 老齢者; 傷病兵.
病弱な〈人など〉; 病人用の〈車など〉.
e.g. as modifier : an invalid husband.
verb (invalids, invaliding, invalided) with object
remove (someone) from active service in the armed forces because of injury or illness:
｟主に英｠ 〈兵士が〉(負傷･病気のため) «…から» 現役を免除される, 送還される(home, out) «of» .
e.g. he was badly wounded and invalided out of the infantry.
disable (someone) by injury or illness.
〈人が〉病気になる
DERIVATIVES
invalidism |-ˌizəm| noun
ORIGIN
mid 17th century (as an adjective in the sense ‘infirm or disabled’): a special sense of invalid2, with a change of pronunciation.
$ \mathrm{invalid}^2 |inˈvaləd|
in- ‘not’ + validus ‘strong’ (see valid)
adjective
(of an official document or procedure) not legally recognized and therefore void because contravening a regulation or law:
〈免許･契約などが〉(法的に)無効の(↔ valid)
e.g. the vote was declared invalid due to a technicality.
(especially of an argument, statement, or theory) not true because based on erroneous information or unsound reasoning:
〈理由･主張などが〉根拠がない
e.g. a comparison is invalid if we are not comparing like with like.
(of computer instructions, data, etc.) not conforming to the correct format or specifications.
〘コンピュ〙 無効の, 受け付けられない
DERIVATIVES
invalidly |inˈvalədlē| adverb
ORIGIN
mid 16th century (earlier than valid): from Latin invalidus, from in- ‘not’ + validus ‘strong’ (see valid).