"Separate" means to divide things or set things or people apart. So, "separate" and "pull apart" are synonyms because they mean the same thing. That means that to solve the analogy, you need to pick out an answer choice that means the same thing as "combine." To "combine" means to put different things together into a single thing. (The prefix "com-" means together.) So, "put together" is the correct answer.

The prefix non- negates the meaning of the word that comes after it, so “nonsense” is opposite in meaning to “sense.” Likewise the prefix un- serves a similar purpose, so someone who is “friendly” is opposite to someone who is “unfriendly.” The key to answering this question is to know which prefix is appropriate to use in this individual case. To provide further help, amiable means friendly and sociable.

The prefix sub- means going under, beneath so a “submarine” is something that travels under water and a “subway” is something that travels underground. The suffix -marine often suggests at a relationship with water.

The prefix non- means related to the number nine. A “nonagon” is a nine-sided shape. To solve this analogy you have to determine which number is related to the prefix hex-, the correct answer is “six.” A “hexagon” has six sides.

“Triplets” are three children born at the same time, of the same mother. The prefix tri- means related to the number three. To solve this analogy, you have to determine what word is used to describe five children born at the same time, of the same mother. The prefix ­-quin means related to the number five, as does the prefix pent-; in this instance, the correct answer is “quintuplets.”

“Sanctify” means to make holy, so to solve this analogy you have to determine which of these answer choices means to make strong. The correct answer is “fortify.” If you were unable to answer this question immediately, it would become helpful to use your knowledge of prefixes. The prefix sanct- means related to holiness or tranquility, and the prefix fort- means related to strengthening or protecting. To provide further help, “vulnerable” means in danger from something specific; “impotent” means powerless; “desirable” means able to be desired, wanted. 

“Ailing” means in pain, sick or suffering, so it is a synonym for “hurt;” therefore, in order to solve this analogy you have to find the best synonym for “rejuvenating;” the correct answer is “healing.” To help you figure this out, the prefix ail- means related to sickness or pain and the word fragment -juve- means related to youth or, in this instance, related to regaining youth and health. To provide further help, ancient means old.

The prefix cent- means related to the number one hundred. A “centipede” is an insect that has one hundred legs, so to solve this analogy you have to determine what a “century” has one hundred of. The correct answer is “years,” there are one hundred years in a “century.”

“Paternal” means relating to fatherhood. So, to solve this analogy, you have to figure out which of these answer choices means relating to motherhood. The correct answer is “maternal.” The prefixes "pat-" and "mat-" usually suggest that the word will be related to men and related to women, respectively. As for the other answer choices, “matrimony” means marriage and “augment” means enhance or make better.

“Juvenile” means young or immature. So, to solve this analogy, you have to determine which answer choice is closest in meaning to "old." The correct answer is “ancient.” The prefix ­"juv-" means having to do with youthfulness and immaturity. To provide further help, “terminate” means end and “terminal” means causing an end or causing death. As you can see, the prefix "term-" means related to ending. To provide additional clarification, a “patriarchy” is a society dominated by men and a “matriarchy” is a society dominated by women. The prefix "patr-" means related to men and the prefix "matr-" means related to women.