<p><strong>Noun</strong></p><ul><li>a short, dull, explosive sound: the steady chug of an engine.</li></ul><p><strong>Verb</strong></p><ul><li>(used without object) chugged, chugging: to make this sound: The motor chugged.</li><li>to move while making this sound: The train chugged along.</li></ul><p><strong>End of Response</strong></p>