"Paltry" meanshaving little meaning, importance, or worthorvery small or meager. "Insignificant" is the only choice that has a definition similar to that of "paltry."

"Trivial" meansunimportant, so "unimportant" is the synonym.

The word "crucial" refers to something that isnecessary to achieve a certain end. For example, if one more loss will eliminate your team from the baseball championship, then winning the next game is crucial. Basically, we are looking for a word that implies great importance. "Vital," which meansessential, is the best choice here. "Unimportant" is the opposite of the answer that we want, and "extra" implies that something ispresent in addition to a certain quantity and unnecessary, not that it is necessary. Finally, "diminutive" means短orunusually small.

If something is pivotal, it means that it isimportant.For example, the last regular football game of a season is pivotal in determining whether the team will play in the semifinals.

Something that is “eminent” iswell-knownorimportant. This is opposed to something that is "imminent," which meansabout to happen. To provide further guidance, "futile" meanspointless; "worthless" meansnot worth anything; "morose" meansmiserable and glum; "novelty" meansinnovation, something original.

"Tangential" is an adjective that means either "diverging from a previous course or line; erratic," or "hardly touching a matter; peripheral." So, we need to pick out an answer choice that means something like "erratic" or "peripheral." "Essential" cannot be the correct answer, then, because "essential" means "absolutely necessary; extremely important," making it an antonym of "tangential," not a synonym. "Nonessential," however, is an adjective that means "not absolutely necessary," and because "nonessential" is the answer choice closest in meaning to "tangential," "nonessential" is the correct answer.

"Petty" is and adjective that meansrelativelyunimportant, so the answer choice closest in meaning to "petty" is "insignificant," an adjective meaningof no significance,unimportant, orirrelevant. None of the other answer are close in meaning to "petty": "lucrative" is an adjective meaningprofitable; "important" is an antonym of "petty" meaningof great significance; and "dark" is an adjective meaninghavinglittle light by which to seeorcloser to black than to white in shade.

"Substantial" meansof great weightorsignificance. Therefore, "significant" is the correct synonym.

Something that is "imperative" iscrucialoressential, so "essential" is the correct answer choice. As for the other answer choices, "somber" meanssad and serious; "abrupt" meanssudden;and "optional" meansnot necessary.

“Pertinent” meansrelevantorable to be appliedand is therefore most similar in meaning to “applicable.” To provide further help, “irrelevant” meansnot related to the subject; “extraneous” means不需要ed, additional, and wasted; “intravenous” meansinjected into the veins; and “immaterial” meansnot related to the subject, irrelevant,ornot pertinent.