mentally or physically unfit

diminished in strength, quality, or utility; " impaired eyesight"

All my life I have been in active service, and now I am a miserable prisoner, without power to do anything, sunk in grief, and with health impaired. – The Freedmen's Book by Lydia Maria Child

Mary did not leave her room for some months; and when she did, it was with a constitution so impaired that she could not endure the slightest fatigue, nor bear the least exposure. – The Home Mission by T.S. Arthur Edition: 10 Language: English

In this way the Eleventh Corps was lost to me, and more than that, because its bad conduct impaired the confidence that the corps of the army had in one another. – The Campaign of Chancellorsville by Theodore A. Dodge

No doubt it tried his constitution severely, and a hot weather at Quetta is, unfortunately, not calculated to restore an impaired constitution. – Memoir of William Watts McNair by J. E. Howard

I hope that wounded ear hasn't impaired your hearing, so that you may listen with attention. – Lord Stranleigh Abroad by Robert Barr

The health and vitality of the branch are so seriously impaired by them that it often dies. – A Year in the Fields by John Burroughs

During the time, the health of Helen, which had been much impaired by the sufferings inflicted on her by De Valence, gradually recovered, and her beauty became as much the admiration of the French nobles as her meek dignity was of their respect. – The Scottish Chiefs by Jane Porter

Like all others engaged in the war whatever we said as a matter of fact we joined an alliance, we became a military power, we impaired our independence. – State of the Union Addresses of Calvin Coolidge by Calvin Coolidge

He said that the governor was very grateful for the confidence reposed in him by the convention, and especially for its approval of his official actions as governor of the State and the representative of his party at the national convention, that in his long and intense application to public duties he had impaired his health and greatly embarrassed his private affairs, but, but, he continued with emphasis. – My Memories of Eighty Years by Chauncey M. Depew

As if his memory were impaired, or his faculties disordered, the prisoner made an effort to rally his attention. – A Tale of Two Cities A Story of the French Revolution by Charles Dickens

When the harmony of the mind has been impaired to this extent, another mental condition arises, according to the wondrous system of moral sequences. – The Philosophy of the Moral Feelings by John Abercrombie

Moreover, the health of Napoleon was impaired, and as he realized this he grew more and more gloomy. – Napoleon's Young Neighbor by Helen Leah Reed

Its caprices were almost human, but they never impaired the credit of its possession in the eyes of my school- fellows; rather they added to the interest of the little machine, inasmuch as no one could foretell its behaviour under any circumstances. – Wilfrid Cumbermede by George MacDonald

He was too tired tonight to do the situation justice, for the blow at the back of his head had taken some of his strength, and he realized that without sleep his utility would be impaired for the morrow. – The Secret Witness by George Gibbs

The diamond produces the most true and smooth work, but the cut of the wheel is at first impaired by the action of the diamond, which is not the case with the tool in Fig. – Modern Machine-Shop Practice, Volumes I and II by Joshua Rose

I can't believe that my nephew's mind is impaired- I can't believe it. – Lady Audley's Secret by Mary Elizabeth Braddon

Her appetite, consequently, was not impaired, though her stomach might have been said to be very full. – Jack Tier or The Florida Reef by James Fenimore Cooper

My constitution is certainly greatly impaired, and ... – The True George Washington [10th Ed.] by Paul Leicester Ford

Meanwhile society had been rent in twain, and confidence in the army and in the administration of justice was seriously impaired. – The Development of the European Nations, 1870-1914 (5th ed.) by John Holland Rose