demulcent
A soothing medication used to relieve pain in inflamed tissues.
Indians of the West Coast used preparations of prickly-pear to treat wounds, burns, contusions, warts, and even to facilitate childbirth. Modern herbalists recognize the plant's slippery-oily juice as a useful emollient and demulcent, which may be used externally to soothe dry, irritated skin or internally as a diuretic or anti-inflammatory agent for the digestive and urinary tracts.
Where it comes from
From Latin dēmulcēns, present active participle of dēmulceō (“to stroke caressingly; to soften, soothe, allure”), from dē- (“from; of”) + mulceō (“to move or touch gently or lightly, to stroke; to make pleasant or sweet; to soften, soothe, alleviate, relieve”).
Adapted from the Wiktionary entry demulcent (CC BY-SA 4.0).