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 inform somebody, especially to supply someone missing or missed information.
An instance of listening.
To pay attention to a sound or speech.
To expect or wait for a sound, such as a signal.
To accept advice or obey instruction; to agree or assent.