Meaning

verb lessen or to try to lessen the seriousness or extent of

verb make less severe or harsh

originFrom Middle English mitigaten (“to relieve pain, soothe; (swelling) to abate; (hemorrhoids) to relieve; (the mind) to placate, appease; to end, check; to stop, cease”), from mitigat(e) (“mitigated, alleviated, relived”, also used as the past participle of mitigaten) + -en (verb-forming suffix), borrowed from Latin mītigātus, the perfect passive participle of mītigō (“to make soft, ripe; to tame,…

Etymology from Wiktionary, CC BY-SA 3.0