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Definition of impair verb from the Oxford Advanced American Dictionary

 

impair

 verb
verb
NAmE//ɪmˈpɛr//
 
impair something (formal)Verb Forms present simple I / you / we / they impair
 
he / she / it impairs
 
past simple impaired
 
-ing form impairing
 
 
jump to other results
to damage something or make something worse His age impaired his chances of finding a new job. Thesaurusdamage
  • hurt
  • harm
  • impair
These words all mean to have a bad effect on someone or something.
  • damage to cause physical harm to something, making it less attractive, useful, or valuable; to have a bad effect on someone or something's health, happiness, or chances of success:The fire badly damaged the town hall. emotionally damaged children
  • hurt (somewhat informal) to have a bad effect on someone or something's life, health, happiness, or chances of success:Hard work never hurt anyone.
  • harm to have a bad effect on someone or something's life, health, happiness, or chances of success:Pollution can harm marine life.
damage, hurt, or harm?
  • Hurt is slightly less formal than damage or harm, especially when it is used in negative statements:It won't hurt him to have to wait a bit. It won't damage/harm him to have to wait a bit.Harm is also often used to talk about ways in which things in the natural world, such as wildlife and the environment, are affected by human activity.
  • impair (somewhat formal) to damage someone's health, abilities, or chances:Even one drink can impair driving performance.
Patterns
  • to damage/hurt/harm/impair somebody's chances
  • to damage/hurt/harm somebody's interests/reputation
  • to damage/harm/impair somebody's health
  • to seriously/greatly damage/hurt/harm/impair somebody/something
  • to badly/severely damage/hurt/impair somebody/something
See impair in the Oxford Advanced Learner's Dictionary