"Prescience" means foresight or the ability to know about something before it has actually happened. "Shortsightedness" and "myopia" are synonyms, so we can eliminate those. "Improvidence" means poor planning for the future, and "unpredictability" the quality of not being able to be foreseen. "Foreknowledge," which means foresight or knowledge of something before it happens, is the only choice that works.

"Impartial" information is unbiased and uncorrupted by personal intervention. For clarification, someone who is "bashful" is easily embarrassed; "harangue" means berate or criticize.

"Unaware" means unknowing. "Informed" means knowing, so it cannot be the correct answer, because it is an antonym, not a synonym, of "unaware." None of the other answers are close in meaning to "unaware": "obvious" means overt or palpable; "complete" means lacking nothing necessary; and "precise" means exact. 

"Uncertain" means not known with certainty, so "unknown," an adjective that means not known, is the correct answer. "Conclusive" is an antonym of "uncertain"; it means definite or indisputable. None of the answer choices have a meaning related to that of "uncertain": "bright" means shining or emiting lots of light; "idiotic" means stupid or foolish; and "frequent" means occuring often or repeated.

"Uncertain" means unknown or unsure, so "unsure" is the correct answer. None of the other answer choices are close in meaning to "uncertain": "complex" means complicated or having many different parts; "frequent" means occurring repeatedly in a relatively short amount of time; "profitable" means lucrative or capable of making a lot of money; and "secretive" means hidden or concealed.

The word “indispensable” consists of the negative prefix “in-,” which means “not,” and the word “dispensable,” so we can infer that it means “not dispensable.” That inference would be correct, as “indispensable” is an adjective that means “absolutely necessary,” so we need to pick out a word that means something like “necessary.” “Superfluous,” then, cannot be the correct answer, because “superfluous” means “unnecessary, especially through being more than enough,” making it an antonym, not a synonym, of “indispensable.” “Essential,” however, is an adjective that means “absolutely necessary; extremely important,” and because “essential” is the answer choice closest in meaning to “indispensable,” “essential” is the correct answer.

“Insignificant” is an adjective that can mean “too small or unimportant to be worth consideration,” “without power or influence” when used of a person, or “meaningless.” So, we need to pick out an answer choice that means something like “unimportant,” “without power,” or “meaningless.” That means that “noteworthy” cannot be the correct answer, because “noteworthy” means “interesting, significant, or unusual,” making it an antonym, not a synonym, of “insignificant.” “Petty,” however, is an adjective that means “ of little importance; trivial,” and because “petty” is the answer choice closest in meaning to “insignificant,” “petty” is the correct answer.

"Indifferent" means apathetic or not caring, so "apathetic," an adjective that means unconcerned or unemotional, is the correct answer. For clarification, "careless" means negligent, "jocular" means good-humored, joking, or playful, and "aggressive" and "belligerent" are synonyms that each mean hostile and confrontational.

"Submerged" means underwater; Dry means without water; Brief means temporary; Mandatory means required; and Tedious means boring.

"Ubiquitous" means existing or being everywhere.

Words you may not know: 

• "Scarce" means not abundant.
• "Urbane" means having sophistication or elegance, a quality often associated with cities. The root "urb-" (as in urban) means city.