concern /kənˈsɜːn/ verb [T]
INVOLVE › to involve someone or be important to them: Environmental issues concern us all. He's more concerned about profits than the safety of his employees.
WORRY › to worry or upset someone: What really concerns me is her lack of experience.
BE ABOUT › If a story, film, etc concerns a particular subject, it is about that subject.
concern yourself › to become involved with doing something: You needn't concern yourself with the travel arrangements.