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Synonyms

impair

1 American  
[im-pair] / ɪmˈpɛər /

verb (used with object)

  1. to make or cause to become worse; diminish in ability, value, excellence, etc.; weaken or damage.

    to impair one's health;

    to impair negotiations.

    Antonyms:
    repair

verb (used without object)

  1. to grow or become worse; lessen.

noun

  1. Archaic. impairment.

impair 2 American  
[an-per] / ɛ̃ˈpɛr /

adjective

French.
  1. noting any odd number, especially in roulette.


impair British  
/ ɪmˈpɛə /

verb

  1. (tr) to reduce or weaken in strength, quality, etc

    his hearing was impaired by an accident

"Collins English Dictionary — Complete & Unabridged" 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012

Related Words

See injure.

Other Word Forms

  • impairable adjective
  • impairer noun
  • impairment noun
  • nonimpairment noun
  • preimpairment noun
  • self-impairable adjective
  • self-impairing adjective
  • unimpairable adjective

Etymology

Origin of impair1

First recorded in 1250–1300; Middle English empairen, empeiren “to make worse,” from Middle French empeirer, from em- im- 1 + peirer “to make worse” (from Late Latin pējōrāre, verb derivative of Latin pējor “worse”; pejoration )

Origin of impair2

First recorded in 1820–30; from French: literally, “odd,” from Latin impār “odd, unequal”; equivalent to im- 2 ( def. ) + pair 2 ( def. )

Example Sentences

Examples are provided to illustrate real-world usage of words in context. Any opinions expressed do not reflect the views of Dictionary.com.

“In particular, how effective drones are in impairing production and transportation of crude via the Strait of Hormuz.”

From MarketWatch

Your boss is expressing his frustration in a way that wouldn’t encourage anyone to work harder and could even impair your performance.

From MarketWatch

Boland says that while it isn’t overly concerning, an uptick in gross impaired loans was notable after trending down in recent quarters.

From The Wall Street Journal

Reasons include a person falling into a coma, a form of dementia like Alzheimer’s, head injury or a stroke that impairs their ability to think or express their wishes.

From MarketWatch

Or if exits of current positions don’t go well, or simply take a long time, that impairs the ability to raise future funds and continue fee growth.

From The Wall Street Journal