Open English Wordnet
Verbs
(v)calm, calm down, cool off, chill out, simmer down, settle down, cool itbecome quiet or calm, especially after a state of agitation“After the fight both men need to cool off.”, “It took a while after the baby was born for things to settle down again.”
(v)calm, calm down, quiet, tranquilize, tranquillize, tranquillise, quieten, lull, stillmake calm or still“quiet the dragons of worry and fear”