The antonyms for the word "over-cast" are clear, sunny, and bright. Clear implies that there are no clouds in the sky, and the sun is shining brightly. Sunny means that there is an ample amount of sunlight with no interference from the clouds. Bright, on the other hand, suggests an intensity of light, making the day seem vibrant and cheerful. These terms are often used to describe weather conditions or moods associated with them. The absence of overcast skies can bring about a feeling of renewal, lightness, and happiness that can have a significant impact on one's daily life.