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.
mid-15c., "pacification," from Middle French apeisement, Old French apaisement "appeasement, calming," noun of action from apaisier (see appease). First recorded 1919 in international political sense; not pejorative until failure of Chamberlain's policy toward Germany in 1939 (Methods of appeasement was Chamberlain's description of his policy).
c.1300 "to reconcile," from Anglo-French apeser, Old French apaisier "to pacify, make peace, appease, be reconciled, placate" (12c.), from the phrase a paisier "bring to peace," from a "to" (see ad-) + pais, from Latin pacem (nominative pax) "peace" (see peace). Related: Appeased; appeasing.