See assuage in Webster's New World Roget's A-Z Thesaurus II
verb
To make less severe or more bearable:
allay, alleviate, comfort, ease, lessen, lighten2, mitigate, palliate, relieve. See increaseTo ease the anger or agitation of:
appease, calm (down), conciliate, dulcify, gentle, mollify, pacify, placate, propitiate, soften, soothe, sweeten. Idiom: pour oil on troubled water. See calm
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