transitive verb

Diminish or put at rest (fear, suspicion, or worry)

the report attempted to educate the public and allay fears

reduce,diminish,decrease,lessen,assuage,alleviate,ease,relieve,soothe,soften,take the edge off,dull,cushion,mollify,moderate,calm,lull,temper,mitigate,palliate,blunt,deaden,abate,tone down