<p><strong>Verb</strong></p><ul><li>To make impure or unsuitable by contact or mixture with something unclean, bad, etc.</li><li>To render harmful or unusable by adding radioactive material to.</li></ul><p><strong>Noun</strong></p><ul><li>Something that contaminates or carries contamination; contaminant.</li></ul><p><strong>Adjective</strong></p><ul><li>Contaminated.</li></ul>