<p><strong>Verb</strong></p><ul><li>(used without object) To form pus; generate purulent matter; suppurate.</li><li>To cause ulceration, as a foreign body in the flesh.</li><li>To putrefy or rot.</li><li>To rankle, as a feeling of resentment.</li></ul><p><strong>Noun</strong></p><ul><li>An ulcer; a rankling sore.</li><li>A small, purulent, superficial sore.</li></ul><p><strong>End of Response</strong></p>