Equivocal means ambiguous, unclear, hazy, vague. To provide further help, "obstinate" means stubborn, inflexible.

"Bizarre" means strange or odd. Usual is the antonym; it means ordinary or common. "Sociable" means friendly and eager to interact and speak with other people. "Sloppy" means careless and not cautious. "Dreadful" means causing great fear.

The word “trite” is often used in expressions like “his trite, meaningless remarks” or “the phrase was rather trite and common.” It often implies that something is insignificant or not important, but this sense follows on the main meaning of the word, namely, overused. It applies to expressions and ideas that have been repeated so often that they have lost their force. They become common knowledge and seem rather uninformative—“everyone knows that trite truth.” Among the options given in the answers, “clichéd” is the best, as it means overused and unoriginal.

We tend to think of “deviant” as used in the phrase “social deviant.” This is often applied to people (perhaps problem-causing children) who are involved in activities that society frowns upon. This usage must not lead us to think that “deviant” means one who does illegal things. It is better understood from the perspective of the word “deviate,” which means to stray beyond the norms. When something is an anomaly, it is just this, namely something that goes away from the norm.

"Tantamount" means the same or identical and is typically found in the phrase "X is tantamount to Y." That makes "same" the correct answer; as for the other answer choices, "stringent" means rigid or tight; "ironic" means coincidental or unexpected; "bubbly" means lively or energetic; and "cryptic" means secret or obscure in meaning.

Among your options, it might be tempting to choose “unreliable”; however, the closest meaning for “erratic” is “irregular” or unpredictable. The word comes originally from the Latin meaning to stray or wander. When someone “errs,” he or she might make a mistake, but the strict sense is that person “goes the wrong way.” Someone might be “unreliable” because they are erratic; however, that is only because that person is irregular or unpredictable. Because they are so, they are thus unreliable.

The word “prolific” comes from the Latin for “bearing offspring.” When an animal is “prolific” it bears much fruit or many children. When an artist is prolific, he or she produces many works. An example sentence would be, “The old man had been a prolific author during his lifetime, writing over a hundred best-selling thriller novels.”

Originally used to describe beverages lacking in flavor, "vapid" came to describe anything that is dull or insipid.

When something is banal, it is extremely overused and has little meaning because of that. For instance, one might speak of a “banal phrase” that is really nothing but empty words or “banal song lyrics” that really express no meaning at all. When something is “vapid,” it does not stimulate at all. The word “vapid” comes from the Latin for “flat” or “tasteless.”

“Fruitful” means fertile, plentiful, fecund, or producing a lot of something, so "fecund," meaning fertile, is the correct answer. As for the other answer choices, “innocuous” means harmless; "blighted" means diseased and specifically refers to plants; "amiable" means friendly and warm in demeanor; and "growing" means maturing.