Aesthetic

(adj.) pertaining to beauty; sensitive or responsive to beauty
Synonyms: artistic
Antonyms: -

Defunct

(adj.) no longer in existence or functioning, dead
Synonyms: extinct, nonexistent
Antonyms: alive

Discomfit

(v.) to frustrate, thwart, or defeat; to confuse, perplex, or embarrass
Synonyms: nonplus, foil
Antonyms: -

Espouse

(v.) to take up and support; to become attached to, adopt; to marry
Synonyms: embrace, wed
Antonyms: repudiate, disavow, renounce

Fetish

(n.) an object believed to have magical powers; an object of unreasoning devotion or reverence
Synonyms: charm, obsession
Antonyms: -

Gregarious

(adj.) living together in a herd or group; sociable seeking the company of others
Synonyms: outgoing, extroverted
Antonyms: aloof, introverted, reclusive

Hapless

(adj.) marked by a persistent absence of good luck
Synonyms: unlucky, ill-starred, unfortunate
Antonyms: lucky, charmed, fortunate

Impeccable

(adj.) faultless, beyond criticism or blame
Synonyms: flawless, spotless, immaculate
Antonyms: grimy, soiled, spotted

Importune

(v.) to trouble with demands; to beg for insistently
Synonyms: implore, dun, tax
Antonyms: -

Interpolate

(v.) to insert between other parts or things; to present as an addition or correction
Synonyms: interpose, introduce
Antonyms: -

Irreparable

(adj.) incapable of being repaired or rectified
Synonyms: irremediable
Antonyms: remediable, fixable, reversible

Laconic

(adj.) concise, using few words
Synonyms: succinct, pithy, compact
Antonyms: garrulous, prolix, loquacious

Languish

(v.) to become weak, feeble, or dull; to droop; to be depressed or dispirited; to suffer neglect
Synonyms: flag, fade, pine
Antonyms: -

Mendacious

(adj.) given to lying or deception; untrue
Synonyms: untruthful, false
Antonyms: veracious

Nadir

(n.) the lowest point
Synonyms: rock bottom
Antonyms: pinnacle, zenith

Omnipresent

(adj.) present in all places at all times
Synonyms: ubiquitous, ever-present
Antonyms: -

Perfunctory

(adj.) done in a superficial or halfhearted manner; without interest or enthusiasm
Synonyms: slapdash, shallow
Antonyms: thorough, assiduous, diligent, meticulous

Plaintive

(adj.) expressive of sorrow or woe, melancholy
Synonyms: sad, lugubrious
Antonyms: cheerful, blithe, joyous, merry

Requite

(v.) to make suitable payment, as for a kindness, service, or favor; to make retaliation, as for an injury or wrong; to reciprocate
Synonyms: reimburse, avenge
Antonyms: -

Tantamount

(adj.) equivalent, having the same meaning, value, or effect
Synonyms: indistinguishable from
Antonyms: -