palliate
Palliate (verb) means to ease the symptoms of an illness without curing it.
Etymology
The verb was inherited from Middle English palliaten (“To palliate (a disease), relieve the symptoms of (a patient); to extenuate (an offense); to conceal, hide”), the adjective and participle from its participle palliat(e); further borrowed either from Middle French pallier or directly from Latin palliātus, perfect passive participle of palliō (“to cover with a cloak”)), from pallium (“a cloak”), see -ate (verb-forming suffix) and -ate (adjective-forming suffix).