mollify

Verb

• make less rigid or softer

• make more temperate, acceptable, or suitable by adding something else; moderate
  • she tempered her criticism
    

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

Related words

• Synonyms: 
  temper , season , pacify , lenify , conciliate , assuage , appease , placate , gentle , gruntle