Antonyms of adj unimpaired

1 sense of unimpaired

Sense 1
unimpaired (vs. impaired) -- (not damaged or diminished in any respect; "his speech remained unimpaired")

impaired (vs. unimpaired) -- (diminished in strength, quality, or utility; "impaired eyesight")
        => anosmic -- (having impaired sense of smell)
        => broken -- (weakened and infirm; "broken health resulting from alcoholism")
        => dicky, dickey -- ((British informal) faulty; "I've got this dicky heart"- John le Carre)
        => diminished, lessened, vitiated, weakened -- (impaired by diminution)
        => dysfunctional -- (impaired in function; especially of a bodily system or organ)
        => dyslectic, dyslexic -- (having impaired ability to comprehend written words usually associated with a neurologic disorder)

Similarity of adj unimpaired

1 sense of unimpaired

Sense 1
unimpaired (vs. impaired) -- (not damaged or diminished in any respect; "his speech remained unimpaired")
          Also See-> undamaged#1; uninjured#1