settle down

from Wiktionary, Creative Commons Attribution/Share-Alike License.

• verb To become quiet and calm after a period of restlessness.
• verb To establish a settled lifestyle, and especially to marry.

from WordNet 3.0 Copyright 2006 by Princeton University. All rights reserved.

• verb become quiet or calm, especially after a state of agitation
• verb become settled or established and stable in one's residence or life style
• verb settle into a position, usually on a surface or ground