To inform somebody, especially to supply someone missing or missed information.
To substitute for somebody or something.
To complete a form or questionnaire with requested information.
To beat up; to physically assault.
To fill; to replace material that is absent or has been removed.
To keep (information, assent etc) to oneself rather than revealing it.
To stay back.
To keep (a physical object that one has obtained) to oneself rather than giving it back to its owner.