The adjective "precise" refers to an extremely accurate or specific measurement or assessment. "Exact," which also refers to an accurate or correct quantity, is our answer. "Careless" is clearly incorrect, since it describes something that is sloppy and unlikely to be perfectly measured. You might use the word "immature" to describe a person who acts unusually young and inexperienced; neither this term nor "incomplete" (unfinished) is related to the given word.

"Devious" is defined as showing a skillful use of underhanded tactics to achieve goals.

This is closest in definition to "sneaky." Although someone who is devious may be "reprehensible," meaning deserving censure or condemnation, is not a close match.

The word "insane" is used to describe someone or something that is crazy. For instance, a person who has lost his or her mind would be called "insane". Such a person requires a lot of care to keep himself or herself safe. An "insane idea" is a crazy one. For example, if someone told you that they were going to try to use a pig as a parachute when jumping out of a plane, you could say that the person had an "insane idea."

The word "firm" is an adjective used to describe something that is physically solid. For example, a firm pillow is one that is somewhat hard—as opposed to a very soft pillow. Sometimes, too, this word is used to describe someone's actions. For example, to say, "He was firm about his wish to have at least eight hours of sleep," means that the person did not give up his desire for the sleep (even if others protested).

“Reluctant” means not willing, so "unwilling" is the correct answer. None of the other answer choices are close in meaning to "reluctant": “cantankerous” means grumpy; “enthused” means excited; “demonic” means marked by qualities of the devil or of demons; “susceptible” means vulnerable or in danger from something specific.

The word "enlightening" comes from the word light, but it is used in a metaphorical sense. It means making something understandable. Think of when we say, "That was an enlightening explanation."It is like the explanation "shines" and makes its topic obvious. The best option for this is "informative," for informative things or actions help to explain something else.

One of the meanings of "dandy" is excellent. The best choice is "terrific" because it is a synonym of "excellent."

A devoted person is someone who is loyal and caring. The verb "to devote" is used to describe spending one's time on a given task. For example, we could say, "He devoted many hours to helping his mother bake cookies for Christmas." The adjective "devoted" expresses some of this same sense of "being involved;" however, it takes on the idea of being loyal. Thus, we would say something like, "He was a devoted friend, always ready to help in even the most difficult of times."

The word "dubious" means doubtful or untrustworthy. The best choice is "doubtful" because it is part of the definition of "dubious_._"Considering the other choices, "double" means two of something, "wrong" means not correct, and "hasty" means quick.

"Delectable" and "delicious" are synonyms, each meaning pleasant-tasting. "Unpalatable," "disgusting," and "putrid" are antonyms, or opposites, of "delectable" and "delicious."