“Miserably” means in a wretched or unhappy way, characterized by great distress or unhappiness. Some antonyms for “miserably” are “happily”, “cheerfully”, and “joyfully”.
“Happily” implies a state of being content and pleased. For example, “They lived happily ever after.” This shows a stark contrast to living miserably, as it indicates a positive and enjoyable state.
“Cheerfully” suggests being in good spirits and full of cheer. “She greeted everyone cheerfully.” Here, the word conveys a sense of optimism and lightheartedness, opposite to the gloom associated with “miserably”.
“Joyfully” means full of joy or happiness. “The children played joyfully in the park.” This antonym emphasizes a state of great happiness and celebration, in contrast to the misery implied by “miserably”.