"Unbelievable" is an antonym of plausible, so to solve this analogy you have to determine the best antonym for robust. "Robust" means in good shape, healthy, so the correct antonym is unhealthy.

A "novice" is the opposite of an "expert," so to solve this analogy you have to find the opposite of subjective. An opinion or feeling based on individual thoughts or perception is "subjective;" an opinion based on facts and evidence is "objective." For clarification, "invective" means criticism or tirade; "wizened" means old and wise.

"Insipid" means boring and as such is an antonym of fascinating. To solve this analogy you have to determine which of the answer choices is the best antonym for hovel. "Hovel" means a small house, a shack, so the best antonym is “mansion.” For clarification, a "port" is a harbor.

"Imperious" means dominant or authoritative and as such is an antonym of subservient. "Subservient" means accustomed to serving. To solve this analogy you have to identify the best available antonym for meticulous. To be "meticulous" means to be very careful and thorough, so the correct antonym is “careless.” For clarification, "nonchalant" describes someone who does not care; "mirthless" means without mirth, miserable; "merciless" means not showing mercy, vengeful.

"Authentic" means genuine or real, so it is an antonym of "fake." To solve this analogy you need to identify the best antonym for contradict. To "contradict" someone is to argue with them, so the correct antonym is “support.”

Allay means to make calmer or less severe; exacerbate means to make worse or more intense. They are antonyms. To solve this analogy you have to identify the best antonym of baneful. Baneful means destructive, so the correct antonym is “creative.” For clarification, perplexing and confusing are synonyms of one another.

If you "monitor" something you are paying close attention to it, as such it is an antonym of ignore. To solve this analogy you have to identify the best antonym for detrimental. "Detrimental" means hurtful, so the best antonym if “helpful.” For clarification, "tactless" means lacking concern about hurting people; "menacing" means threatening.

Something that is "tenuous" is uncertain, so it is an antonym of "certain." In order to solve this analogy you need to find the best synonym for fortified. "Fortified" means reinforced or strengthened, so the correct antonym is “weakened.” For clarification, "elongated" means made longer; "abridged" is a synonym of "shortened."

"Life" is an antonym of "death," so to solve this analogy, you have to determine which of the answer choices is an antonym of "healthy." The correct answer is “ailing,” a word that means sick or unwell. For clarification, "mediocre" means average, "remorseful" means full of regret and guilt, and "verbose" means lengthy or long-winded.

"Terse" means brief and is an antonym of "lengthy." Therefore, to solve this analogy, you have to identify the best antonym of "frigid." Frigid means very cold, so the answer choice that is its best antonym is “stifling,” which means very hot or restrictive. For clarification, "divisive" means troublesome or disruptive, and "lukewarm" and "tepid" are synonyms that mean of a moderate temperature that is not very hot or cold.