The word "fatuous" is an adjective that means foolish or lacking wit. "Dull," which can mean lacking wit, shares the same definition and is therefore the best answer choice. Considering the other choices, "bright" in this context is an antonym of "fatuous" since it can mean intelligent. "Portly" means heavy or fat.

“Diligent” means careful, hard-working, and taking care to do something well, so "careful" is the best synonym amongst the answer choices. “Approachable” means friendly and thus easily approached; “demonstrative” means demonstrating something or openly showing feelings or affection; “eloquent” means well-spoken; and “elegant” means having grace, sophistication, and good taste.

“Contemptuous” means showing scorn and hatred for something, so "scornful" is the correct answer. As for the other answer choices, “remorseful” means full of guilt and sadness over something one did wrong; “docile” means calm and compliant; “impregnable” means unable to be captured or broken; and “surreptitious” means secret and sneaky.

“Gregarious” means friendly and sociable, so "sociable" is the correct answer. As for the other answer choices, “implacable” means unappeasable, unable to be placated, or not forgiving; “domineering” means controlling; “complementary” means something that works well with something else; and “supplementary” means additional.

Someone who is “stoic” is unemotional and unresponsive when faced with painful or difficult situations, so "unemotional" is the best answer. As for the other answer choices, “responsive” means reacting or done in response; “critical,” when referring to the significance of something, means highly important, though it can also mean pointing out the faults in something; “fortuitous” means owed to good-fortune or lucky; and “frivolous” means purposeless and not serious.

Someone who is “magnanimous” is generous and charitable, or "benevolent." As for the other answer choices, “malevolent” means wicked and unkind; “colloquial” means conversational or using language unique to a certain region; “incoherent” means unable to be understood; and “submissive” means listening to others and doing what they want without arguing.

“Lax” means negligent, not giving enough attention to something, or not taking something seriously enough, so "negligent" is the best synonym amongst the answer choices. As for the other answer choices, “odious” means unpleasant, revolting, or disgusting; “prolific” means able to produce a large quantity of something quickly; “tedious” means dull and boring; and “remorseless” means not feeling guilty about one's actions.

A "verbose" person uses more words than are necessary to describe something. Instead of saying, "The sunset was beautiful," a verbose description would include every color of the sunset and how the colors changed over time. "Loquacious" means talkative, which is the most similar in meaning to "verbose." All of the other answers are also personality traits, but do not have the same meaning as "verbose" and "loquacious." In fact, "silent" is the antonym of "verbose. 

"Abominable" means universally hated. If you "detest" something, you hate it. "Desirable" is the opposite of hated; if you desire something, you want it. "Dominant" means most important or most powerful. This is also the opposite of abominable. "Systematic" means to do something in an organized fashion and "questionable" means doubtful. The only word similar to abominable is detestable.

"Fanatic" is a zealot or a person who is very passionate about something. "Fatigue" means extreme tiredness or exhaustion. "Fidelity" means faithfulness or loyalty to a person or cause. "Hibernation" is when an animal goes into a temporary rest usually during a season. "Dilemma" is a situation in which a person has to choose between two unfavorable paths.