mitigation

noun

Etymology: From Middle French mitigation, from Latin mitigatio.

1. A reduction or decrease of something harmful or unpleasant.

   “Two golden hours, in which the astonishing news of the intended party was revealed to Louisa, with all of its contrivances, expenses, and mitigations, so far as they were elucidated, were given and said to be "done in her honour;"...”

   “One possible drought mitigation strategy for Afghanistan is to divert excess water from water-rich river basins to water-scarce river basins in cases where this is technologically, economically and environmentally feasible.”