The term "most mad-dog" refers to something that is extremely aggressive or erratic. Antonyms for it would be words that signify calmness or serenity. Some words that could be used as antonyms of "most mad-dog" are relaxed, composed, mellow, placid, tranquil, and peaceful. These words convey a sense of ease, contentment, and quietness, which are the opposite of what "most mad-dog" represents. When we use antonyms in our vocabulary, we add depth and variety to our communication style. By using antonyms to balance out the impact of "most mad-dog," we can create a more nuanced and balanced perspective of the world around us.