<p><strong>Adjective</strong></p><ul><li>extremely bad</li><li>unpleasant</li><li>ugly</li><li>inspiring fear</li><li>dreadful</li><li>terrible</li><li>solemnly impressive</li><li>inspiring awe</li><li>full of awe; reverential</li><li>extremely dangerous, risky, injurious, etc.</li></ul><p><strong>Adverb</strong></p><ul><li>Informal: very; extremely</li><li>He did an awful good job of painting the barn.</li><li>It's awful hot in here.</li></ul>