<p><strong>Preposition</strong></p><ul><li>below the surface or level of; directly or vertically beneath; at or on the bottom of</li><li>under the control of; in a lower position in a hierarchy of authority: Underneath the department heads are the junior executives</li><li>hidden, disguised, or misrepresented, as by a false appearance or pretense: Underneath his bluster is a timid nature</li></ul><p><strong>Adverb</strong></p><ul><li>below; at a lower level or position; on the underside</li></ul><p><strong>Adjective</strong></p><ul><li>lower; situated below or under</li></ul><p><strong>Noun</strong></p><ul><li>the bottom; underside; lowest part</li></ul>