Phrasal Verb: Settle

to settle for s.t. - to accept s.t. even though it is not the best or what you really want
"You shouldn't settle for a job you don't like. You won't be happy for very long."
"I'm not in love with this apartment but I'll settle for it because of the cheaper rent."

to settle in/into s.t- to begin to feel happy/relaxed in a new situation- job, school, house
"It takes some time to settle into a new job"
"How's your new job? Are you settling in OK?"

to settle on s.t. - to decide/agree on s.t.
"So did you settle on a place for dinner?"
"They haven't settled on anything yet."

to settle up- to pay what you owe on a bill or account
"I'll settle up and then we can go."

to settle down
1- to start living a quiet/calm life in one place, especially after getting married.
"After getting married, they settled down in Toronto to start a family."
"I'm not thinking about settling down now. I just want to travel and see the world." 

2- to become quiet and calm
"Shhhh! Can you guys please settle down?"