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The Definition of - Impair (verb)

    verb (used with object)
    to make or cause to become worse; diminish in ability, value, excellence, etc.; weaken or damage:
    to impair one's health; to impair negotiations.
    verb (used without object)
    to grow or become worse; lessen.
    Archaic. impairment.

Word Example of - Impair

    Example Sentences for impair

    When the crystals accumulate so as to impair the cell, the tube is slipped off and a new one put on.

    And he went about it with a zest that knew no flagging, with a relish that nothing could impair.

    Slight fatigue from typewriting will not, however, impair efficiency in a different sort of work.

    After a silence Buckhurst said: “All that may be, madame, yet not impair your creed.”

    All compromise of the truth or any measures that impair testimony to God are to be avoided.

    Have I ever done anything to stultify, degrade you, or impair your self-respect?

    She was a stouter person, but the stoutness did not impair her dignity; she bore her flesh well.

    The severity of his religion did not impair the amiability of his character.

    It certainly does not destroy the powers of self-control, or impair the knowledge of moral good and evil.

    It did not in the least impair his value as a soldier or commanding officer.

Word Origin & History of - Impair

    Word Origin & History

    impair late 14c., earlier ampayre, apeyre (c.1300), from O.Fr. empeirier, from V.L. *impejorare "make worse," from L. in- "into" + L.L. pejorare "make worse," from pejor "worse." In ref. to driving under the influence of alcohol, first recorded 1951 in Canadian Eng.