Step 1: Understanding the Question:
The task is to determine the antonym of the adjective "SANGUINE".
We must consider its modern English usage to find the opposite meaning among the choices.
Step 2: Detailed Explanation:
The word "SANGUINE" is an adjective that means optimistic, positive, cheerful, or hopeful, especially in an apparently bad or difficult situation.
The word derives from the Latin "sanguis," meaning blood, because medieval medicine believed that a person with an abundance of blood had a naturally cheerful and positive temperament.
For example, "The CEO remained highly sanguine about the company's future despite the recent financial losses."
Let us evaluate Option (A) "bloody".
While "bloody" relates to the literal Latin root of the word, it does not serve as an antonym for the modern psychological definition used in standard English.
Let us evaluate Option (B) "thin".
Thin refers to physical width or having little flesh. This is entirely unrelated.
Let us evaluate Option (C) "optimistic".
Optimistic is the direct synonym of sanguine. Since we need the antonym, this is incorrect.
Let us evaluate Option (D) "gloomy".
Gloomy means feeling distressed, pessimistic, dark, or depressed.
A gloomy outlook is the exact psychological opposite of a sanguine (optimistic) outlook, making it the perfect antonym.
Let us evaluate Option (E) "dangerous".
Dangerous refers to a state of risk or peril, which is unrelated to a person's inner disposition.
Therefore, "gloomy" is the correct antonym.