A "portent" is a sign that something is about to happen. The best choice is "omen," as it shares the same definition as "portent." Considering the other choices, a "portal" is a passageway, "portable" means able to be carried, and "journey" means trip when used as a noun, or travel from one place to another when used as a verb.

A "query" is a question or inquiry into some matter, so "inquiry" is the correct answer. A "protagonist" is the main character in a novel or story. The "climax" is the peak or most important point of something. "Perpetuity" means something that lasts forever or the quality of continuing either for a limitless amount of time or for a very long time. A "lantern" is a portable lamp.

An "odyssey" is a long adventure or journey, so "journey" is the correct answer. "Omission" means a failure to include something. "Reservoir" means a large body of water used as a source for drinking water. "Pinnacle" means the highest point or peak of something. An "umpire" is a person who judges a certain sporting event.

"Affinity" means a natural attraction to something. The best choice is "preference," which means fondness, predilection, or inclination. So, if you have an affinity for ice cream, you also have a preference for ice cream. Considering the other choices, "friendship" means a friendly relationship with another, "reservation" means hesitance, and "blemish" means a mark that destroys the perfection of something.

A “vocation” is an occupation, a job, or a career. To provide further guidance, a "diatribe" is an angry speech; "admonish" means to tell off, to condemn; "quarantine" is where something or someone is placed in isolation to prevent a disease from spreading.

A “pathogen” is an agent of disease, typically either a virus or bacteria. To provide further help, an “antibody” is something naturally produced by the body to fight off pathogens; a “paramedic” is someone who responds to the scene of an accident to aid those who have been injured and rush them to the hospital. 

The word "synopsis" means a brief description of the events in a story or the important parts of something. The best choice is "summary," which means a brief and comprehensive description of something. Considering the other choices, "penchant" means a strong preference, "execrable" means disgusting, and "aftermath" means the result or reaction to some event.

An “epigram” is a concise, witty saying which is most similar in definition to “axiom.” To provide further help, a “motif” is a repeated design or theme; the “thesis” is where the main argument of an essay is stated; “sarcastic” means ironic, mocking; “dialogue” means conversation between two people. 

"Apathy" is a lack of interest in something. The best choice is "disinterest" because it means a lack of interest. Considering the other choices, a "street" is a roadway, "apply" means make use of or submit a request, and "absent" means not present or gone.

“Avarice” is wanting more material wealth than you need, or "greed." As for the other answer choices, “sloth” is laziness; “envy” is jealousy or wanting something that someone else has; “warmth,” when used to describe a person, means open-heartedness, kindness and affection; and “generosity” means kindness in giving liberally.