"Taciturn" means "uncommunicative" or tight-lipped, adjective to describe someone who rarely speaks.

"Loquacious" means excessively talkative or chatty.

"Verbose" means wordy or said in a not succinct way.

"Perfunctory" means done as a routine, automatic, or unthinking.

"Odiferous" means smelly, or having odor.

"Alacrity" means "liveliness," alertness or promptness.

"Grievous" means sorrowful or painful; something that causes grief.

"Unruly" means raucous, disorderly or violent.

"Complaisant" means agreeable, indulgent or good natured.

"Sluggishness" means laziness, slowness, or moving with the slowness of a slug.

"Quixotic" means "idealistic," or dreamy, or fantastical. It is a word derived from the book Don Quixote de la Mancha by Cervantes.

"Chauvinistic" means biased, intolerant or prejudiced. 

"Pessimistic" means expecting the worst to happen, depressed, despondent.

"Rational" means logical, reasonable or sane.

"Adept" means skilled or proficient.

"Doting" means indulgent, affectionate or loving.

"Content" means happy or satisfied.

"Envious" means having envy, or desiring a trait possessed by someone else. 

"Adorable" means sweet and cute or lovable.

"Hateful" means nasty, cruel or despicable. 

"Snarky" means "judgmental," cynical or rude.

"Forthright" means straightforward and honest. 

"Vapid" means dull, insipid or boring.

"Smart" means intelligent or clever. 

"Talkative" means communicative, or the quality of talking a lot.

"Irascible" means "cranky" or prone to anger.

"Wicked" means cruel or evil; villainous.

"Needy" means impoverished, disadvantaged, or in need.

"Poised" means steady, composed or balanced in mannerism. 

"Spry" means agile or full of life; vivacious.

"Indolent" means "lazy' or idle, lackadaisical.

"Serene" means calm and clear-headed.

"Intrepid" means brave or courageous.

"Jubilant" means full of joy, happy.

"Industrious" means hard-working, diligent, productive.

"Jaded" means "indifferent," somebody who is bored because s/he has experienced a lot.

"Thrifty" means frugal, tight-fisted; describes someone who doesn't like to spend money.

"Querulous" means argumentative and hard to please. Describes someone who quarrels excessively.

"Offbeat" means strange, weird, or eccentric.

"Indolent" means lazy, easygoing or slothful.

"Altruistic" means "unselfish," charitable, humanistic.

"Klutzy" means clumsy, awkward, or bumbling.

"Bigoted" means prejudiced or biased. 

"Homely" means ordinary or it means ugly.

"Close-minded" means blind, stubborn, rigid in opinion.

"Wanton" and "playful" are synonyms referring to a carefree (as opposed to serious) disposition. The other words do not have this meaning. Although the word "wanton" is somewhat difficult, analyzing the other answer choices and recognizing that "playful" is not at all related to the words "bothersome," "disinterested," "boring," and "dull," which all have negative connotations, can help you arrive at the correct answer.