This sentence is not very difficult and only slightly hides the correct answer. Had it said that he assaulted “his mother,” it would have been extremely easy. The correct answer is “matricide.”

The first half comes from the Latin for mother. (Think of related words like “maternal”). The second half comes from Latin for “to kill.” (Think of related words like sui + cide—to kill oneself—or homo + cide—to kill a human being).

A pedant displays knowledge excessively (and hence is really tiresome for a student, who might not need to have such shows of details all the time). The word is related to “pedagogue,” which is derived from the Greek for teacher, but it has taken on these additional shades of meaning.

The man needs time that is not as interactive with others after he has had his social contact; therefore, he needs “solitude,” a word derived from Latin bases meaning “alone,” “single,” and “only.”

The opposition implied in this sentence is between our blank and "revolts." The opposite of a situation of turmoil would be one that is wholly at standstill. (This is likewise indicated by “a time of total inactivity” in the second sentence). The best option is "stasis," which is directly derived from a Greek word with a similar meaning. It is reflected in words that likewise have “stat-” in their root, such as “static” and “statue.”

Clearly, we want no negative connotations in our answer, so this helps to eliminate everything other than “interlocutors” and “preachers.” The latter is rather bland and does not fit anywhere nearly as well as “interlocutor,” which means “a person in a conversation.”

The prefix “inter-” indicates that the word involves “between” (such as intervarsity or interstitial)—NOT to be confused with “intra,” which means “within” (such as “intramural,” which literally means within the walls). The second half, “-locutors,” is derived from the Latin for to speak or talk, which has many derivatives in English not only including those with the “c” that we see in “interlocutors” (e.g. locution, allocution) but also the more common (and phonetically related) “q” (e.g. eloquence, loquacious, colloquium, colloquial).

The key is that the student’s theory reduces everything to one. Such a theory is “monistic,” a word derived from the Greek monos, meaning “single,” which we see in words like “monocle,” “monogamy,” and “monotonous.”

Since the sense of the clues is not negative in this sentence, it would not be appropriate to choose “demagogue,” for such a person would merely appeal to popular sentiment to make specious “arguments.” An “orator” would be a better case here, for such a person’s eloquence could fit the bill for inspiring the people. The word is derived from Latin roots that likewise give us the word “oratory” and “oration;” however, it is also related to the word for mouth, os, which often has forms with the base “or-;” therefore, other related words are orifice, oral, and osculum.

The word “similitude” means “being similar to something else.” This is better than several of the tempting options, such as “replication,” “redundancy,” and “clone,” all of which imply likeness too strongly. The sentence’s “barely” needs a weaker word, for being “barely” a replication really would mean that something is almost identical—which clearly does not seem to be the case, given that few would have recognized the man thus honored. The word “similitude” is related to English words like “similar” and “similarity.”

One who is “munificent” is extremely generous. The word is derived from the Latin “munus,” which means gift but also office. Hence, it has derived English words like “municipality” as well as “remuneration.” The ending “-ficent” comes from the same root as ending like “-fy” and “-ficate,” meaning to do or make and found in many English words.

This is a strange sentence, but it leads you directly to your word. The poor old ambassador above all has knee damage.

The “genu-“ of “genuflection” comes from the Latin word for knee, while the “-flection” means related to bending. There are many related English words like “flexible,” “reflect,” “inflect,” and so forth.