Which term means gloomy or ill-tempered?

The term that means gloomy or ill-tempered is "morose." This word is derived from the Latin "morosus," which means "peevish" or "sullen." It describes a state of mood characterized by sadness, melancholy, or a disposition that seems persistently gloomy. A morose person often displays a lack of cheerfulness and can be seen as withdrawn or sulky, reflecting an overall ill-tempered demeanor.

In contrast, "candid" refers to being straightforward and truthful, usually associated with honesty rather than mood. "Optimistic" conveys a sense of hopefulness and confidence about the future, while "sanguine" suggests a cheerful and optimistic outlook, often associated with a rosy disposition. These terms focus on positive or neutral attitudes rather than the gloomy connotations inherent in "morose."