<p><strong>Adjective</strong></p><ul><li>absolutely necessary, essential, or requisite: an indispensable member of the staff.</li><li>incapable of being disregarded or neglected: an indispensable obligation.</li></ul><p><strong>Noun</strong></p><ul><li>a person or thing that is indispensable.</li></ul><p><strong>End of Response</strong></p>