<p><strong>Verb:</strong></p><ul><li>simple past tense of retard.</li><li>Synonyms: slowed, delayed, decelerated.</li></ul><p><strong>Adjective:</strong></p><ul><li>Older Use: Usually Offensive. Characterized by a slowness or limitation in intellectual understanding and awareness, emotional development, academic progress, etc.</li><li>Slang: Disparaging and Offensive. Stupid or foolish.</li></ul><p><strong>Noun:</strong></p><ul><li>(used with a plural verb) Usually the retarded.</li><li>Older Use: Offensive. People who are slow or limited in mental development.</li></ul>