allay[ə'leɪ]
verbdiminish or end (fear or concern).
alleviate (pain or hunger).
Origin
OEālecgan'lay down or aside', of Gmc origin.
ThesaurusallayverbREDUCE, diminish, decrease, lessen, assuage, alleviate, ease, relieve, soothe, soften, calm, take the edge off.
Oppositesincrease, intensify.