Downcastness refers to a feeling of sadness, discouragement, or dejection. The antonyms for downcastness are words that describe a person's positive feelings, such as happiness, cheerfulness, vitality, and optimism. Joyfulness, exuberance, enthusiasm, and exultation are some other antonyms for downcastness. These words describe the opposite of a downcast mood, and they can help to lift one's spirits, provide inspiration, and increase positive energy. By focusing on the antonyms of downcastness, we can cultivate a more positive outlook on life, and develop a sense of hope and resilience in the face of challenges.