The antonyms for the word "more overzealous" are restrained, moderate, and cautious. When someone is restrained, they exercise a measured approach to a situation, carefully considering their actions before making any decisions. Being moderate means that a person is balanced and sensible in their actions, avoiding any extreme behaviors. Finally, being cautious involves being careful and thoughtful about potential risks and taking appropriate measures to avoid any harm. These antonyms illustrate the opposite of being overly enthusiastic or fervent, which can sometimes lead to negative consequences if not kept in check.