General antonyms:
* Cheerful: This is a broad antonym that captures the opposite of being gloomy and sullen.
* Happy: Similar to cheerful, this emphasizes a positive emotional state.
* Jovial: This suggests a more lively and good-humored disposition.
Antonyms emphasizing specific aspects:
* Optimistic: This contrasts with the pessimism often associated with moroseness.
* Vivacious: This highlights a lively and energetic spirit, the opposite of being withdrawn.
* Enthusiastic: This emphasizes a passionate and eager attitude, which is the antithesis of apathy.
* Lighthearted: This suggests a carefree and playful demeanor, contrasting with the seriousness of moroseness.
Ultimately, the best antonym for "morose" will depend on the context and the specific shade of meaning you want to express.