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The definition of impair

1 Definitions of: impair

    1. verb, to reduce or weaken in strength, quality, etc
    2. Show me some examples of this word: impair
    3. Show me the etymology of the word: impair
Synonyms: deteriorate, worsen, reduce, damage, injure, harm, mar, undermine, weaken, spoil And more...
Antonyms: improve
 

From Collins

©HarperCollins 2008. Collins English Dictionary definition of impair