You searched for: “vitiation
vitiation (s) (noun), vitiations (pl)
1. Injury, contamination, impairment of use or efficiency: The vitiation of his left arm made it difficult for Hector to use his motorcycle.
2. A change in a process that hampers a utility or reduces efficiency: Turning on only one bank of lights instead of two in the storeroom was a vitiation which made it difficult for Tom and the other workers to complete their repairs.
3. A weakening or the prevention of doing something: Breaking her leg was a vitiation of Jean's ability to run her Bed & Breakfast business efficiently.