assuage in WordNet English dictionary

1. satisfy (thirst)
   "The cold water quenched his thirst"
   quench  slake  allay  assuage 
   
2. provide physical relief, as from pain
   "This pill will relieve your headaches"
   relieve  alleviate  palliate  assuage 
   
3. cause to be more favorably inclined; gain the good will of
   "She managed to mollify the angry customer"
   pacify  lenify  conciliate  assuage  appease  mollify  placate  gentle  gruntle