"Garner" is a verb that means "gather or collect something, especially. information or approval," so we need to pick out another word that means something like "collect." While "swindle" may look like a potentially correct answer because "swindle" means "to take money or property from someone by using lies or tricks," "amass" is actually a closer synonym to "garner," as "amass" means "to gather or collect something, such as a large amount of money, especially for yourself." So, because "amass" is the answer choice closest in meaning to "garner," "amass" is the correct answer.

"Propel" is a verb that means "to push or drive someone or something forward or in a particular direction," so we need to pick out a word that means something like "push." While "propeller" might sound like a good answer because it contains the word "propel," "propeller" is a noun, not a verb, so it can't be the correct answer. "Shove," which means "to push someone or something with force," is the answer choice closest in meaning to "propel," so "shove" is the correct answer.

"Whet" is a verb which means "to sharpen the blade of a tool or weapon," or "to excite or stimulate someone's desire, interest, or appetite." So, we need to pick out another verb that means something like "sharpen." While "whet" sounds like "wet," and "dampen" is synonymous with "wet" when "wet" is used as a verb, "whet" has a very different meaning than "wet," so "dampen" cannot be the correct answer. "Hone," however, is a verb that means "to sharpen with a whetstone" or "to make sharper or more focused or efficient." Since "hone" is the answer choice closest in meaning to "whet," "hone" is the correct answer.

While "follow" might seem like a good answer because to "tail" someone is to follow them, "curtail" does not mean the same thing as "tail," so "follow" is not the correct answer. Similarly, while "curmudgeon" and "curtail" both begin with "cur-," curmudgeon is a noun and curtail is a verb, so they cannot be synonyms. Since "curtail" means "reduce in extent or quantity; impose a restriction on," "reduce" is its closest synonym and the correct answer.

"Douse" means to drench or extinguish, usually with water. Dehydrate and Dry would be the opposite meaning of douse. Fluctuate means to waver and mimic is to imitate, so they are not synonyms of douse.

"Retract" means to pull back or withdraw. Advance is to go forward, which is the opposite meaning of Retract. Poach means to hunt, Permeate means to penetrate, and Laud means to applause. None of these words have any relation to Retract.

To curtail means to cut short or shorten.  

To vacillate and to fluctuate both mean to continually shift back and forth. 

Strike means to hit forcibily.

Infiltrate means to gain access to something surreptiously, or gradually invade.