A “wizard” is a male witch. To provide further help, “witchcraft” is the practice of magic by witches. The suffix "-craft" suggests a type of work or craft. A “humanist” is someone who has great faith in the capabilities of mankind and who thinks rationally about the world.

The suffix "-meter" suggests that the word in question will relate to the measurement of something. The prefix "therm-" or "thermo-" means having to do with heat, temperature, or fire, so a “thermometer” is something used to measure temperature. So, to solve this analogy, you need to pick out an answer choice that describes what a ruler measures. A ruler measures length, so "length" is the correct answer.

A “herbologist” is a person who studies plants. The suffix "-ology" means the study of something and "-ologist" means a person who studies something. Similarly, a "zoologist" is a person who studies animals. To further help you, "biology” is a branch of science that studies life; “vigorous” and “fast” are synonyms; “happy” and “well" are also synonyms.

The suffixes "-able" and "-ible" generally mean able to be or able to do, as in the the word “manageable,” which means able to be managed. To solve this analogy, you need to determine which of these answer choices means able to be defended. The correct answer is “defensible."

The suffix "-ten" means to make, so “lengthen” means to make longer and “moisten” means to make wetter.

A “magician” is someone who practices magic, so to solve this analogy, you have to find the word that means someone who studies history, or “historian.” “Magician” and “historian” both have the suffix "-ian," which means type of person. To provide further help, “historiography” is the study of historical practice; a “scientist” is someone who studies science; “humanities” is a broad subject group including history, art, and literature; a “warlock” is a male witch, a wizard. 

The suffix "-ward" means having to do with the direction of [adjective or preposition]. Moving "forward" is the opposite of moving "backward," so you need to pick out an answer choice which represents the opposite of "up." "Down" is the opposite of "up," so "down" is the correct answer.

"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.