verb (v)

• make calm or still(verb.emotion)

  Synonym:
  calm, calm down, lull, quiet, quieten, still, tranquilize, tranquillize
  Antonym:
  agitate, charge, charge up, commove, excite, rouse, turn on
  

  source: wordnet30
• cause to be calm or quiet as by administering a sedative to(verb.body)

  Synonym:
  calm, sedate, tranquilize, tranquillize
  Antonym:
  arouse, brace, energise, energize, perk up, stimulate
  

  source: wordnet30