Synonyms 1. calm, placate. 3. Appease, conciliate, propitiate imply trying to preserve or obtain peace. To appease is to make anxious overtures and often undue concessions to satisfy the demands of someone with a greed for power, territory, etc.: Chamberlain tried to appease Hitler at Munich. To conciliate is to win an enemy or opponent over by displaying a willingness to be just and fair: When mutual grievances are recognized, conciliation is possible. To propitiate is to admit a fault, and, by trying to make amends, to allay hostile feeling: to propitiate an offended neighbor.
early 14c., from O.Fr. apaiser, apeser "to pacify, make peace, appease, be reconciled, placate" (12c.), from the phrase a paisier "bring to peace," from a- "to" + pais, from L. pacem (nom. pax) "peace."