settle down

Verb

• become 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.
    

• become settled or established and stable in one's residence or life style
  • He finally settled down
    

• settle into a position, usually on a surface or ground
  • dust settled on the roofs
    

Related words

• Synonyms: 
  calm , calm down , cool off , chill out , simmer down , cool it , settle , root , take root , steady down