When one channels something, he or she redirects it from one location to another.  Vincent is clearly doing this, having resolved to transfer is energy from his annoyances to productive work.   The word literally indicates a structure (manmade or natural) that allows fluid to flow, though it is often applied to any sort of medium (even electromagnetic) allowing for the passage of content from one point to another.  It is related to the word canal.

In this sentence, there is no implication that Timothy’s girlfriend would be nasty in trying to convince him into changing his attitude. The only thing that is indicated is that she is “indefatigable,” a word meaning “untiring;” therefore, the best option would be “cajole,” which means to persuade insistently or even through flattery. Though no flattery is implied in our sentence, the insistence is implied, and that suffices in comparison with the other options.

Since the child is stealing something insignificant, the best option is “pilfer.” Although several of the options pertain to stealing, only “pilfer” adds the sense of taking something of little value—in this case, “some small candy.”

When someone “goes beyond” the boundaries, he or she is said to “transgress” them. The “trans-” prefix means “across” as is evident in words like “translate” (to carry across—languages in this case) and “transform” (to change “across” from one form or appearance to another). The “-gress” comes from the Latin for “to walk or step” found in English words like “gradient,” “grade,” and “egress.”

When someone “niggles” over the details of something, he or she criticizes minor details. In our sentence, this best captures the sense hinted at by the sister’s “streams of critical remarks over the minor details . . .” The verb “to niggle” can also be applied to one who is “niggling” over the details of a given work, even his or her own. Someone who never is satisfied with the small details of his or her (e.g.) writing will often “niggle” over these details incessantly.

The key thing to note here is that Richard's motives were prejudged in a way that appears to be negative. When someone is vindicated, he or she is cleared of suspicion. The word comes from Latin roots for “avenger.” One who is vindicated can often be said to be “avenged,” though without necessarily carrying the somewhat violent connotations accompanying that word.

For this sentence, it is necessary to avoid implying anything more than is warranted. Most of the options given have a negative connotation (i.e. “meander,” “stumble,” “tumbled,” and “veered”). In distinction from such negative words, one can be said to “range” over topics without it being implied that such ranging is mere rambling in an undirected manner; therefore, this is the best option.

Do not be tricked by the many options that appear to be similar in meaning. To “masticate” is to chew, and to “manducate” is to eat. The best term is “mascerate,” which means “to soften something by soaking it.”

Since the sentence indicates that the prince had been in a meeting, we can safely assume that the “after . . . “ describes an event preceding his act of deciding. This event is referred to in the subordinate clause, “thus ignoring . . .” as being a meeting. Since he is said “nevertheless” to have ignored the advisors, it is safe to say that the meeting was held in order to “consult” with them.

In this sentence, both meaning and structure help to indicate the answer. The preposition “to” is not used much with a number of the options, and while an awkward construction does not eliminate an answer, it does make it a much less worthwhile option. The word “resigned” functions both in the structure and by meaning. Since Sarah accepted the root canal, though apparently not desiring it, she can be said to have “resigned” herself to it. The word has a first meaning of “leaving a position by ones own choice” (as in “resigning from the board of directors”). Here, one can take the meaning as “resigning” from one’s desire to avoid the painful procedure.