Impair

from WordNet (r) 3.0 (2006)
impair
    v 1: make worse or less effective; "His vision was impaired"
    2: make imperfect; "nothing marred her beauty" [syn: {mar},
       {impair}, {spoil}, {deflower}, {vitiate}]
    
from The Collaborative International Dictionary of English v.0.48
Impair \Im*pair"\, v. t.
   To grow worse; to deteriorate. --Milton.
   [1913 Webster]
    
from The Collaborative International Dictionary of English v.0.48
Impair \Im"pair\, a. [F. impair uneven, L. impar; im- not + par
   equal.]
   Not fit or appropriate. [Obs.]
   [1913 Webster]
    
from The Collaborative International Dictionary of English v.0.48
Impair \Im*pair"\, n.
   Diminution; injury. [Obs.]
   [1913 Webster]
    
from The Collaborative International Dictionary of English v.0.48
Impair \Im*pair"\, v. t. [imp. & p. p. {Impaired}; p. pr. & vb.
   n. {Impairing}.] [Written also {empair}.] [OE. empeiren,
   enpeiren, OF. empeirier, empirier, F. empirer, LL.
   impejorare; L. pref. im- in + pejorare to make worse, fr.
   pejor worse. Cf. {Appair}.]
   To make worse; to diminish in quantity, value, excellence, or
   strength; to deteriorate; as, to impair health, character,
   the mind, value.
   [1913 Webster]

         Time sensibly all things impairs.        --Roscommon.
   [1913 Webster]

         In years he seemed, but not impaired by years. --Pope.

   Syn: To diminish; decrease; injure; weaken; enfeeble;
        debilitate; reduce; debase; deteriorate.
        [1913 Webster]
    
from Moby Thesaurus II by Grady Ward, 1.0
109 Moby Thesaurus words for "impair":
      abate, abrade, abstract, abuse, afflict, aggravate, aggrieve, bate,
      befoul, bewitch, blemish, blight, condemn, corrupt, cripple,
      crucify, curse, curtail, damage, decrease, deduct, defile, deprave,
      depreciate, derogate, despoil, destroy, deteriorate, detract,
      dilapidate, diminish, disadvantage, disparage, disserve, distress,
      do a mischief, do evil, do ill, do wrong, do wrong by, doom, drain,
      eat away, embitter, endamage, envenom, erode, exacerbate, extract,
      file away, get into trouble, harass, harm, hex, hurt, infect,
      injure, irritate, jinx, leach, lessen, make worse, maltreat, mar,
      menace, mistreat, molest, outrage, persecute, play havoc with,
      play hob with, poison, pollute, prejudice, purify, put back,
      reduce, refine, remove, retrench, rub away, ruin, sap, savage,
      scathe, shorten, spoil, subduct, subtract, taint, take away,
      take from, tarnish, thin, thin out, threaten, torment, torture,
      undermine, violate, vitiate, weaken, wear away, weed, withdraw,
      worsen, wound, wreak havoc on, wrong

    

[email protected]