(Archaic) To plunder; despoil.
To cause physical harm to; hurt:
To harm or damage in some way; be bad for
(Music) To reduce (a perfect or a minor interval) by a half step
(Cooking) To boil (a liquid) in order to decrease the volume and concentrate the flavors
(Obs.) To overthrow
To cause to have a small mark or marks that diminish attractiveness:
To cause to lose the use of a limb or limbs.
To become or cause to become less or smaller, as in number, amount, or intensity.
To lower or remove the value of something.
To do harm to:
To delay action; be a hindrance
To retard or obstruct the progress of.
To become less; decrease:
To impair the soundness, perfection, or integrity of; spoil.
To weaken morally; debase; pervert
To spoil the soundness or perfection of
To treat badly; harm.
To cause a flaw in; make defective:
To cause to have or show prejudice; bias
To dull the luster of; discolor, especially by exposure to air or dirt:
To remove flowers from (a plant)
Find another word for impair. In this page you can discover 34 synonyms, antonyms, idiomatic expressions, and related words for impair, like: break, spoil, injure, hurt, diminish, undermine, reduce, damage, destroy, weaken and afflict.