Aquaphobia is the fear of water. Whenever you see the prefix ­­"aqua-," you can assume that the word will have something to do with water. So to solve this analogy, you have to determine what chronophobia is a fear of. Chronophobia has the same prefix as the word "chronological" (which has to do with the passage of time), so it would be reasonable to assume that the prefix "chrono-" implies a relationship to time. This line of thinking would lead you to the correct answer, that chronophobia is the fear of time or the passage of time.

"Ante-" and "pre-" both mean "before;" both words refer to things that come before other things. "Post" means "after" and "script" refers to writing, so a postscript is an afterword.

Anhydrous means without water ("an" = without, "hydro" = water), and analgesic means without pain ("an" = without, "algesia" = pain).

The Greek prefix hyrdo- means related to water. "Hydrodynamic" means a branch of science concerned with the movement of water and other fluids. To solve this analogy you need to consider the meaning of the Greek prefix therm- which means heat, temperature. "Thermodynamics" is therefore a branch of science concerned with heat, temperature and their relationship to movement and energy. The correct answer is therefore "heat." You might also have noticed that the root -dynam- means related to energy.

The key to solving this analogy is to know that the prefix sept- means seven and the prefix oct- means eight. So, a "septuagenarian" is someone who is in their seventies and an "octogenarian" is someone who is in their eighties.

An "aquarium" is a place where ocean-dwelling creatures are housed and displayed. So, to solve this analogy you have to determine which of these words describes an enclosure where a land-based creature (such as a snake) might be housed. It can be helpful when solving this problem to consider your Latin prefixes. "Terr-" means of or related to the Earth. So, a "terrarium" is the correct answer. Additionally, an "arboretum" is a place where trees are grown; "reptilian" means relating to the qualities of reptiles (like snakes and alligators).

To solve this analogy you need to rely on your knowledge of Greek roots. To begin with the prefix ichthy- means fish, so "ichthyology" is the study of fish. So, what is "ecclesiology" the study of? The Greek prefix ecclesi- means congregation, church. So, "ecclesiology" is the study of churches.

The prefix theo- means related to religion or to "God." So, "theocracy" is the rule of a government through "God" or the application of religious laws. To solve this analogy you need to determine what "autonomy" is the rule of. Well, auto- means "self," so "autonomy" is the ability to rule oneself.

The Greek and Latin prefix anti- can mean either opposite, against as in "antisocial" which means not social. Or, anti- can mean old, ancient. In "antiquated" it is used in the latter sense, "antiquated" means very old, outdated, ancient. Something from the past could be described as "antiquated," so which of these is a word that could describe something from the present? The correct answer is "current" which means contemporary, in the present. Additionally, "youthful" means young; "mundane" means ordinary, boring; "severe" means intense, harsh; "obdurate" means stubborn, intractable.

The Greek prefix astr- means stars, sun and the Greek root -nom- means arrangement, order, study. So, "astronomy" is literally the arrangement of the stars or the study of outer space. Furthermore, the Greek prefix geo- means Earth, of the Earth and the suffix -ology means study of. So, "geology" is literally the study of the Earth or the study of rocks and rock formations.