pacify

Verb

• fight violence and try to establish peace in (a location)
  • The U.N. troops are working to pacify Bosnia
    

• cause to be more favorably inclined; gain the good will of
  • She managed to mollify the angry customer
    

Related words

• Synonyms: 
  lenify , conciliate , assuage , appease , mollify , placate , gentle , gruntle