_"_Vacant” means empty or unoccupied, so "empty" is the correct answer. As for the other answer choices, “meaningful” means important and significant; “insignificant” means not important; “quirky” means unconventional.

"Distant" means far away or aloof. To further help you, "blend" means mix together or combine; "separate" means not connected or not combined when used as an adjective and pull apart when used as a verb. "Separate" is an antonym of "combine" and "blend."

The prefix "mis-" means done wrong or badly, so something that has been “misplaced” has been placed incorrectly. This is closest in meaning to “lost.” To provide further help, “limpid” means clear; “morose” means very sad and serious; “supreme” means best or highest; “searched” means looked for.

"Affiliated" means connected to or partnered with. To further help, you, the "protagonist" is the hero of the story; the "antagonist" is the villain of the story; "narrator" means storyteller.

Something that is "systematic" occurs as the result of a system or plan that has been put into play. Something that is "systematic" is thus "efficient" becauase it has been planned out to be as useful and direct as possible in achieving its results.

"Appropriate" means suitable or proper for what is going on. Fitting also means suitable or correct for a situation, so "fitting" is the correct answer. As for the other answer choices, to "fumble" something means to use one's hands in a clumsy manner while doing something, "queasy" means feeling sick or ill to one's stomach, "entire" means whole or with no parts missing, and a "chamber" is a large room.

"Barren" means empty, devoid of life, or when referring to a woman, unable to have children. So, "empty" is the correct answer. None of the other answer choices are close in meaning to "barren": "fecund," "fertile," and "abundant" are synonyms which all mean plentiful or producing a lot of life, so "barren" is an antonym of "fecund," "fertile," and "abundant."

The word "impersonal" is made up of two parts: "im" and "personal." The "im-" prefix is a form of the "i-" prefix that means not. To be "impersonal" is to be "non-personal." Now, that seems a bit strange at first sight. However, to be "non-personal" means that something does not show the kind of individual characteristics that a person would show. For instance, a "personal" letter is one that is written directly for someone else, often containing things that show that the letter writer knows the person to whom he or she is writing. However, an "impersonal" letter is one that is written without really paying attention to its receiver. We receive these kinds of "impersonal" letters in the mail when we get something from a company telling us about new services. (Many other examples could be provided, of course!)

The best option among those provided is "formal," which means following a given way of acting, or in other words, following a given form of acting. This implies that someone or something is not "particular" (as would be something "personal"). Instead, it follows a given "form" that can be applied to anything or anyone whatsoever.

Conventional means traditional, normal, or usual. To further help you, the other four answer choices are all antonyms of conventional because they have the opposite meaning. Abnormal means not normal; absurd, bizarre and ridiculous all mean very weird.

"Apart" means distant from each other.