Which word represents an attitude filled with gloom and discouragement?

The term that embodies an attitude filled with gloom and discouragement is "dismal." This word is often associated with a sense of bleakness or a lack of hope, capturing the essence of despair and negativity. In contexts where someone is feeling down, dismal aptly conveys the somber emotions they might experience.

The other options present contrasting attitudes: "bright" signifies positivity and light, "cheerful" reflects an uplifting and happy disposition, and "exuberant" indicates high energy and enthusiasm. Each of these words conveys a sense of positivity and vitality, making them incompatible with the notion of gloom and discouragement found in "dismal." Therefore, the choice of "dismal" as the word representing such a negative attitude is clearly the most appropriate.