mitigate (v.) Look up mitigate at Dictionary.com
early 15c., "relieve (pain)," from Latin mitigatus, past participle of mitigare "soften, make tender, ripen, mellow, tame," figuratively, "make mild or gentle, pacify, soothe," ultimately from mitis "gentle, soft" (from PIE root *mēi- "mild") + root of agere "to do, perform" (from PIE root *ag- (1) "to drive, draw out or forth, move"). Related: Mitigated; mitigating; mitigates.