The antonyms for the word "was gloomy" are numerous, and they all point to a brighter, more optimistic perspective. Cheerful, bright, sunny, radiant, luminous, lively, and vibrant are just a few of the antonyms that can replace the negativity of the word gloomy. These antonyms suggest a sense of hope, positivity, and vitality that can uplift even the most despondent mood. The power of positive language cannot be overstated, and using these antonyms in place of "was gloomy" can shift the tone of a sentence or conversation and inspire a more positive outlook on life.