The word “dolor” means sad, coming from Latin roots regarding sadness and pain. The “in-” prefix sometimes means in or into but can also mean not. Someone who is indolent wishes to avoid sadness and pain—by doing nothing. The word thus comes to mean something like “lazy.” While “depressed” might seem correct, that has more to do with being “dolorous” than being “indolent.” An indolent person is much more like a sloth—slow-moving. Thus, “slothful” (meaning lazy) is an excellent synonym.

The word “fidelity” is derived from the Latin roots for “faith” and is found in other words like “confident” and “infidel.” When someone shows fidelity, that person is faithful to someone or something. For instance, to say, “Raul showed fidelity to his wife all throughout their marriage, never once breaking the trust of their marriage vows.”

The word “marine” means “related to the sea.” It is derived from the Latin for “sea” and is found in words like “maritime” and “submarine.” A “mariner” is another word for a sailor—a person who does his work “on the sea.”

The root "ego" is derived from the Latin word for self and the suffix "-centric" means centered on or around, so it makes sense that “egocentric” means thinking most of oneself, or“narcissistic.”“Magnanimous” means generous, particularly with money; “prodigal” means wasteful with money; “revolting” means disgusting or rebelling, and "lucid" means clear or easy to understand.

The prefix "con-" means with, and "-curr-" derives from the Latin for run, so it makes sense that “concurrent” means running together, or in other words, happening at the same time, or “simultaneous.” “Esoteric” means likely to be understood by a small number of people, rarefied, or abstract; “antecedent” means forerunner or something that comes before another thing; “antipathy” is hostility or animosity; and “reverence” is deep respect or worship.

The prefix "re-" can mean do again, and the Latin root "juven" means youth, so it makes sense that "rejuvenate" means make someone or something look or feel young again. This is very close to the meaning of the word “revitalize,” which means give new life to. As for the other answer choices, “homogenize” means make uniform or standardize; “grovel” means beg while on one's knees on the ground; “truncate” means shorten; and “pardon” means officially forgive.

Do not be tricked into thinking that the word “luster” is related to “lust.” The two words come from very different bases. “Luster” is related to the same Latin root from which we get the word “illustrate.” The root means to illuminate. (An illustration “illuminates” a topic by making it visible to the eye.) The best meaning for “luster” is therefore “glow.” Something with a luster has a sheen or brightness that glows.

The word deluge comes from the Latin for “to wash away.” The “-luge” portion means “wash” and is found in words like “dilute” and “ablution” (the washing of oneself). Often, one finds the word used in literary sources referring to “the Deluge,” referring to the Biblical story of Noah’s ark and the flood. At times, the word “antediluvian” is used to insult something by implying that something is “older than Noah’s flood.” Note that the word “deluge” can be used to indicate not only a flood of water but also any great amount happening at one time.

The word “current” comes from the Latin for “to run.” Although it can mean “concerning the present moment,” it can likewise mean “to flow,” as when someone talks about the flow of water or electrical current (the “flow of electrons”). This general meaning is the one that is most appropriate among the answer options.

The word “genre” is related to the Latin “genus,” a term that we still use in logic to mean “general kind.” For instance, when someone says “man is a rational animal,” the general class “animal” is the genus into which “man” is placed (so to speak). When we speak of “genres of music,” what we really mean are “classes” or “general types” of music. For instance, one might say, “The most popular genres of music are baroque organ and renaissance polyphony, not rock and ska.”