settle down

US /ˈset̬.l̩ daʊn/
UK /ˈset̬.l̩ daʊn/
"settle down" picture
1.

to become calm, quiet, or comfortable

:
The children finally settled down after playing all afternoon.
Please settle down and listen to the instructions.
2.

to start living a quiet and routine life in one place, often by marrying and having children

:
After years of traveling, he decided to settle down and buy a house.
They got married and settled down in the suburbs.