Palliate

To treat partially and incompletely.

To palliate a diseases is to treat it partially but not cure it completely.

Palliation cloaks a disease.

Palliate has several senses, including: to reduce the severity of (a disease); to moderate the intensity of something; and to cover by excuses and apologies.

The Latin 'pallium' referred to a type of cloak in ancient Greece and Rome and, later, to a white woolen band with pendants in front and back worn by the pope or an archbishop as a symbol of full episcopal authority.

Pallium was modified to form 'palliate,' an adjective meaning 'cloaked' or 'concealed' and a verb meaning 'to cloak,' 'to cloth,' or 'to shelter.' Today 'palliate' implies disguising or concealing badness or evil and suggests alleviating the vile effects of wickedness or illness