The whole thing was so exquisitely wrought that age had only softened the lines, without in the least impairing them.
The caution increased his cunning but was impairing his character.
Simple-minded and warm-hearted, he won the devotion of his men without relaxing soldierly habits or impairing discipline.
Depressing thoughts interfere with the cerebral circulation, impairing the nutrition of the cells and nerve centers.
Perhaps it was because he vaguely felt that she was impairing something in herself that was precious to him.
Rapid changes of temperature act as an exciting cause of laminitis by impairing the normal blood supply.
What are the agencies alternately improving or impairing the racial qualities?
It's impairing her looks, making her nervous and almost hysterical—in a word, quite unlike herself.
We must now consider whether there is any direct way of impairing good heredity.
Yet there is something more that may be learned without at all impairing these qualities.
late 14c., earlier ampayre, apeyre (c.1300), from Old French empeirier (Modern French empirer), from Vulgar Latin *impeiorare "make worse," from assimilated form of in- "into, in" (see in- (2)) + Late Latin peiorare "make worse" (see pejorative). In reference to driving under the influence of alcohol, first recorded 1951 in Canadian English. Related: Impaired; impairing.