invalid

• 形容某事物无效、不正确或不被接受，常用于技术或正式语境。

Describes something that is not valid, correct, or acceptable, often used in technical or formal contexts.

1. Not legally or officially acceptableB2formal

   Having no legal force or effect; not valid according to the law or rules.

   无效的

   • The contract was declared invalid due to a missing signature.
   • His passport was invalid because it had expired.
   • The court ruled the evidence as invalid.

   同义词ineffectiveinoperativenugatorynullunenforceablevoid

   反义词bindingeffectivelawfullegalvalid

2. No longer effective or usableB2formal

   Something that has lost its validity or authority, often due to time or changed circumstances.

   无效的

   • This coupon is invalid after the end of the month.
   • The software license became invalid after the update.
   • Her driver's license was invalid because it was not renewed.

   同义词expiredineffectiveinoperativelapsednullobsoletevoid

   反义词bindingcurrenteffectiveoperativevalid

• 指因疾病、受伤或残疾而长期身体虚弱、需要他人照顾或帮助的人。

A noun referring to a person who is chronically ill, injured, or disabled, often requiring care or assistance.

1. Person with chronic illnessB2formal

   A person who is incapacitated or weakened by a long-term illness or injury.

   残疾者

   • The hospital provides special care for invalids.
   • He became an invalid after the accident.
   • She dedicated her life to helping invalids.

   同义词convalescentpatientshut-insufferervaletudinarian

• 动词，指因疾病或受伤而使某人无法继续服役或履行职责，或使某人丧失能力。

A verb meaning to remove someone from active service or duty due to illness or injury, or to disable or incapacitate.

1. Force to retire or remove from active dutyC1formalbritish

   To remove someone from active service, especially in the military or emergency services, due to illness or injury.

   因伤病退役

   • He was invalided out of the army after the accident.
   • The firefighter was invalided from active duty due to severe burns.
   • Many soldiers were invalided home during the war.

2. Injure permanentlyC1formalbritish

   To cause a permanent injury that prevents someone from working or performing their duties.

   使伤残

   • The accident invalided him for life.
   • She was invalided by a fall from a horse.
   • The disease invalided her, leaving her unable to walk.

   同义词crippledisablehamstringincapacitatemaim