to be responsible for or to take care of sb / sth
look after yourself / sb / sth
to be responsible for or to take care of sb / sth
Who's going to look after the children while you're away?
look after yourself / sb / sth
to make sure that things happen to sb's advantage
He's good at looking after his own interests.
Definiciones del Oxford Advanced Learner's Dictionary, 9.ª edición