"Credible" means believable or trustworthy. For example, a newspaper is credible if it has high reporting standards and rarely makes mistakes or reports inaccurate information. So, "trustworthy" is the correct answer.

"Beneficial" means useful or helpful, so "helpful" is the correct answer. To help you, "deleterious" is a synonym of harmful, and both words are antonyms of "beneficial." To further help you, "sarcastic" means humorous, ironic and not serious, and "suspicious" means doubtful.

The prefix "metro­-" means related to the city or to city life. A “metropolis” is a big city. To provide further help, we call the towns just outside a big city “suburbs.” 

If you connected the adjective, "pacific," with the Pacific Ocean, you made a proper connection, though it probably didn't help you with the definition, as all of the options could describe that body of water. More helpful would be the related words "pacify" and "peace." These could lead you to connect the word "pacific" with its correct meaning of peaceful and calming.

The Latin root "carn" means meat or body, so a “carnivore” is a meat-eater. A “herbivore” is an animal that eats plants (the root "herb" meaning plants); a “vegetarian” is a human that does not eat meat; and an “omnivore” is an animal that eats both plants and meats, the prefix "omni-" meaning all. "Voracious" means extremely hungry or fervent.

The Latin root "jud" means law, so “judgment” is a ruling by a court of law. It can also refer to the ability to make good decisions or having good sense. “Nonsense” means speech or writing that makes no sense; “wit” is the ability to be funny by being clever; “resolve” is determination; and "honesty" is truthfulness.

The Latin root "fid" means faith or trust, and the Latin prefix "con-" means with, so it makes sense that to “confide” means to put trust in and to tell secrets to someone. The Latin prefix "mis-" means not, so it makes sense that “mistrust” means to suspect and not trust and that “misunderstand” means to not understand, or to understand incorrectly. “Reprimand” means to punish for a relatively small wrongdoing.

The root "scribe" means write, and the prefix "pre-" means before, so it makes sense that “prescribe” means recommend the use of (often specifically in the sense of a doctor recommending and authorizing that medicine be given to a patient), since when a doctor prescribes a patient a medication, he writes down a prescription; this means that "recommend" is the answer choice closest in meaning to "prescribe." " “Ignore” means purposely not pay attention to; “demonstrate” means show how something is done; “will” is intend or transfer property or money in a will (a document stating how you want your possessions distributed after your death); and “portend” means suggest at something negative happening in the future.

The root "mono" means one, and the "-ton-" in "monotonous" derives from "tone," meaning sound, so it makes sense that “monotone” means producing one tone. However, it also means boringly uniform and uninteresting. "Uninteresting" is thus the correct answer. As for the other answer choices, "defiant" means rebellious; "convoluted" means complex or overly complex; "enervated" means having used up all of one's energy or exhausted; and "productive" means yielding useful results.

The prefix "per-" means through, and it is here combined with a Latin word that means "stay," so it makes sense that "permanent" means staying or lasting throughout all time or intended to do so. This means that "lasting" is the correct answer. As for the other answer choices, “acceptable” means good enough, “frivolous” means having no purpose or seriousness; “considerable” means of enough significance to be thought about or of a notable amount; and "carefree" means untroubled.