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TOEFL IELTS BNC: 7785 COCA: 7440

impair

verb

im·​pair im-ˈper How to pronounce impair (audio)
impaired; impairing; impairs

transitive verb

: to diminish in function, ability, or quality : to weaken or make worse
It has been known for nearly 100 years that memory is impaired by bilateral damage to either of two brain regions … Larry R. Squire
The use of drugs further complicates the situation of these families and sometimes impairs their ability to raise children. Ellen L. Bassuk
… the prospect of generating normal profitability is impaired by excessive debt service. John Nozell
The physician also checks for signs of endometriosis, a condition in which the cells that normally compose the uterine lining grow outside the uterus, sometimes impairing fertility. Martha Southgate
impairer noun
… the overwhelming majority of hookups involved alcohol use—an impairer of sexual judgment if ever there was one … Tiffany Sharples

Synonyms

Choose the Right Synonym for impair

injure, harm, hurt, damage, impair, mar mean to affect injuriously.

injure implies the inflicting of anything detrimental to one's looks, comfort, health, or success.

badly injured in an accident

harm often stresses the inflicting of pain, suffering, or loss.

careful not to harm the animals

hurt implies inflicting a wound to the body or to the feelings.

hurt by their callous remarks

damage suggests injury that lowers value or impairs usefulness.

a table damaged in shipping

impair suggests a making less complete or efficient by deterioration or diminution.

years of smoking had impaired his health

mar applies to injury that spoils perfection (as of a surface) or causes disfigurement.

the text is marred by many typos

Example Sentences

Smoking can impair your health. Drinking impairs a person's ability to think clearly. His memory was so impaired by age that he often forgot where he was.
Recent Examples on the Web In turn, disruption of bacterial balance can impair tolerance to digested glucose (sugar) and contribute to insulin resistance. Bryant Stamford, The Courier-Journal, 15 Sep. 2022 One aimed at the auto industry would forbid motor vehicle makers from blocking owners’ access to diagnostic information or impair aftermarket parts manufacturers from producing or offering compatible aftermarket parts. Sabrina Eaton, cleveland, 14 Sep. 2022 These protein accumulations impair brain function and are associated with memory impairment. Agnès Lacreuse, The Conversation, 31 Aug. 2022 Mercury poisoning can impair children’s development and attacks the central nervous system, causing a range of health issues from loss of vision to cardiovascular disease, according to a report by Fiocruz, a public health care research institute. New York Times, 2 Aug. 2022 Alcohol can impair your judgment and motor skills in the water, which can be dangerous. Kathleen Wong, USA TODAY, 26 July 2022 That will impair the central bank’s ability to defend the Russian currency, the ruble, which has fallen sharply since the invasion began. WSJ, 28 Feb. 2022 Tech challenges can, do and will impair value chain effectiveness and efficiency. Noah Barsky, Forbes, 11 July 2022 These diseases impair hemoglobin, a protein in red blood cells that carries oxygen. New York Times, 27 June 2022 See More

Word History

Etymology

Middle English empeiren, from Anglo-French empeirer, from Vulgar Latin *impejorare, from Latin in- + Late Latin pejorare to make worse — more at pejorative

First Known Use

14th century, in the meaning defined above

Time Traveler
The first known use of impair was in the 14th century

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