IMPAIR To weaken, diminish, or relax, or otherwise affect in an injurious manner.Davey v. /Etna L. Ins. Co. (C. C.) 20 Fed. 4S2; State v. Carew, 13 Rich. Law (S. C.) 541.91 Am. Dec. 245; Swinburne v. Mills, 17 Wash. 011, 50 Pac. 489, 61 Am. St. Rep. 932.