impaired

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WordReference Random House Learner's Dictionary of American English © 2016
im•pair /ɪmˈpɛr/USA pronunciation   v. [+ object]
  1. to make worse;
    damage:Smoking can impair your health.
im•pair•ment, n. [uncountable]impairment of the learning process.[countable]a hearing impairment.

WordReference Random House Unabridged Dictionary of American English © 2016
im•pair  (im pâr), 
v.t. 
  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.

v.i. 
  1. to grow or become worse;
    lessen.

n. 
  1. [Archaic.]impairment.
Etymology:
  • Late Latin pējōrāre, equivalent. to Latin pējōr-, stem of pējor worse + -ā- thematic vowel + -re infinitive suffix; compare pejorative
  • Middle French empeirer, equivalent. to em- im-1 + peirer to make worse
  • Middle English empairen, empeiren to make worse 1250–1300
im•paira•ble, adj. 
im•pairer, n. 
im•pairment, n. 
1 . See injure.  1 . repair.
im•pair  (an per), 
adj. [French.]
  1. noting any odd number, esp. in roulette. Cf. pair.


Collins Concise English Dictionary © HarperCollins Publishers::

impair /ɪmˈpɛə/ vb
  1. (transitive) to reduce or weaken in strength, quality, etc: his hearing was impaired by an accident
Etymology: 14th Century: from Old French empeirer to make worse, from Late Latin pējorāre, from Latin pejor worse; see pejorative

imˈpairable adj imˈpairer n imˈpairment n



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