A "nonentity" is a person or thing with no noteworthy qualities, something profoundly unimportant. So, a quality of a "nonentity" is to be "inconsequential," which of these is a quality of a "sojourn." Well, a "sojourn" is a brief, "temporary" stay somewhere. Additionally, "deferential" means respectful, willing to allow others to take control; "contrite" means remorseful, feeling sorry for a wrong; "surreptitious" means clandestine, deliberately kept secret so as to avoid censure; "eternal" means lasting forever.

"Phosphorous" is a chemical element known for its properties of spontaneous combustion and illumination in the dark. So, a quality of "phosphorous" is to be "luminous," which means emitting light. To solve this analogy you need to determine which of these is a quality of a "limerick." Well, a "limerick" is a short, five-lined poem that is funny and usually obscene. A quality of a "limerick" is to be "humorous." Additionally, "ponderous" means slow-moving or boring; "incumbent" means obligatory, has to be done; "celestial" means divine, heavenly; "bestial" means savage, wild.

A "nanosecond" is an incredibly small passage of time. A quality of a "nanosecond" is to be "brief," so to solve this analogy you need to determine which of these could be described as "prosaic." Well, "prosaic" means having the quality of prose, writing that is not poetic. So, the correct answer is a "textbook." Additionally, an "aperture" is an opening; a "ditty" is a playful song.

A "curmudgeon" is a grumpy old-man, someone who is mean-spirited and not cheerful. So, a quality of a "curmudgeon" is to be "surly" (bad-tempered, irritable). Which of these is a quality of a "devotee?" Well, a "devotee" is someone who is committed to an institution or idea, usually a "religious" institution or idea. So, a quality of a "devotee" is to be "religious." 

A "philanderer" is a man who has many illicit sexual affairs with various women. So, a quality of a "philanderer" is to be "licentious," which means dissolute, promiscuous, depraved, prone to having many sexual encounters. To solve this analogy then you need to determine which of these is a quality associated with a "shark." The correct answer is to be "predatory," which means of a hunting nature. Additionally, "celibate" means abstinent, to be abstaining from sexual encounters; "equitable" means fair, honest, unbiased; "homely" means plain in appearance, unattractive; "quiescent" means at rest, inactive. 

A "plutocrat" is a wealthy person who holds power within society. A quality of a "plutocrat" is to be "moneyed" (wealthy, affluent, rich). So, to solve this analogy you need to determine which of these is a quality of an "optimist." Well, an "optimist" is someone who believes the best case scenario is likely to happen, someone who feels good about the future. A quality of an "optimist" is to be "sanguine," which means positive, optimistic even in the face of stress or calamity. Additionally, "pusillanimous" means cowardly; "craven" means cowardly, pathetic, and wicked; "extenuating" means (of circumstances) excusable; "obfuscating" means confusing.

A "serpent" is a snake. One quality of a "serpent" is to be "sibilant," which means to speak with a hissing sound, to have the qualities of a snake. So, to solve this analogy you need to determine which of these is a quality of a "rhapsody." Well, a "rhapsody" is a highly passionate, poetic, or "emotional" phrase or expression.

A "stoic" is a person who can endure difficulty, boredom, or suffering without complaint. A quality of a "stoic" is to be "placid," which means even-tempered, not easily disturbed or angered. So, to solve this analogy you need to determine which of these is a quality of an "eyesore." Well, an "eyesore" is something that is unattractive to look at, a building or feature of the land that is unattractive. So, a quality of an "eyesore" is to be "unattractive," which means ugly and offensive. Additionally, "abstruse" means (of knowledge) hard to understand and known by a privileged few, esoteric; "circumspect" means thoughtful; "supercilious" means arrogant, disdainful, acting as if you are better than other people; "pernicious" means harmful, having a negative impact over time. 

A "killjoy" is someone who is always negative and says things that take away from the fun of others. A quality of a "killjoy" is to "complain," which means express discontent with, worry about. So, to solve this analogy you need to determine which of these is a quality of the "Sabbath." Well, the "Sabbath" is a day reserved for religious observance. So, the correct answer is "holy." Additionally, "irate" means very angry, furious; "docile" means tame, easily controlled, obedient; "quaint" means cute and attractive in an old-fashioned way. 

"Ambulatory" is an adjective that means either having to do with walking or physically able to walk. So, someone or something who is ambulatory is able to walk, and we need to pick out an answer choice in which the second word is an adjective that means one is able to do what the first word describes. While "protect is to defensible" might look like a potentially correct answer, something that can protect is not necessarily itself defensible (able to be defended). So, "protect is to defensible" cannot be the correct answer. "Feel is to sentient" is the best answer choice because just as someone or something ambulatory is able to walk, something that is sentient is able to feel, as "sentient" means able to feel things.