Impair
Black's Law Dictionary · Henry Campbell Black, M.A. · 1910
Black's Law Dictionary
To weaken, diminish or relax or otherwise affect in an injurious manner.
Davey v. Ætna L. Ins. Co. (C. C.) 20 Fed. 482; State v. Carew, 13 Rich. Law (S. Ct) 541, 91 Am. Dec. 245; Swinburne v. Mills, 17 Wash. 611, 50 Pac. 489, 61 Am. St. Rep. 932.