Antonyms

Oscitancy means drowsiness, dullness or apathy. Ebullience means zestful, enthusiasm, exhilaration or exuberance. Hence, (1) is the answer.

Vinculum means that which binds; a bond or tie i.e. link. Sever means to separate; make or become distinct; divide. Hence, (2) is the answer.

Lunacy means great folly or a foolish act; insanity, madness. Its opposite is sagacity, meaning wisdom; maturity. Hence, (B) is the answer.

Coetaneous means contemporary; coeval (of the same age or period);pedigree means descent; lineage; ancestry; thereby characterizing different ages. Hence, (E) is the answer.

Dubitable means that is to be doubted; uncertain apodictic means that can clearly be shown or proved; absolutely certain or necessarily true. Hence, (D) is the answer.

Defunct means no longer living or existing; dead or extinct. Its opposite is extant, meaning still existing; not extinct; not lost or destroyed. Hence, (B) is the answer.

Cicerone is a guide who explains the history and chief features of a place to sightseers. Its opposite is impostor, meaning a person who deceives or cheats others, esp. by pretending to be someone or something that he or she is not. Hence, (A) is the answer.

Glabrous means Having no hairs or projections; smooth: a glabrous scalp; glabrous leaves. Its opposite is hirsute, meaning hairy; shaggy; bristly. Hence, (C) is the answer.

Obsecrate means to entreat solemnly; beseech; supplicate. Its opposite is accede, meaning to give assent; give in; agree. Hence, (D) is the answer.

Suffrage means a vote or voting; esp., a vote in favor of some candidate or issue; therefore characterizes democracy. Autarchy means absolute rule or sovereignty; autocracy. Hence, (A) is the answer.

Tergiversate means to desert a cause, party, etc.; become a renegade (a person who abandons a party, movement, etc. and goes over to the other side) ; apostatize, traitor. Partisan means a person who takes the part of or strongly supports one side, party, or person; often, specific, an unreasoning, emotional adherent. Hence, (E) is the answer.

Occlude means to block, curb, impede. Its opposite is detonate, meaning to cause (a bomb, dynamite, etc.) to explode; discharge. Hence, (E) is the answer.

Restive means unsettled, impatient, fidgety. Its opposite is unflappable, meaning not easily excited or disconcerted; imperturbable; calm. Hence, (A) is the answer.

Carouse is a noisy, merry drinking party. Cortege is a ceremonial procession, as at a funeral.
Hence, (B) is the answer.

Omega means the last (of any series); end. Among the choices, its opposite is preamble, meaning an introductory fact, event, etc.; preliminary. Hence, (A) is the answer.

Garrulity refers to excessive talkativeness; loquaciousness.
Gruff refers to rough or surly in manner or speech; brusquely (rough and abrupt in manner or speech) rude.
Hence, option (4) is the correct answer.

Posit means to set down or assume as fact; postulate (to assume without proof to be true).
Corroborate means to make more certain the validity of; confirm; bolster; support. Hence, (D) is the answer.

Aquiline means Curved or hooked like an eagle's beak: an aquiline nose. Snub means short and turned up; pug: said of the nose. Hence, (A) is the answer.

Tousled means to disorder, dishevel, muss, rumple, etc. preen means to make (oneself) trim; dress up or adorn (oneself); spruce, trim. Hence, (A) is the answer.

Clamor is a loud outcry; uproar. Quietude is a state of being quiet; rest; calmness. Hence, (B) is the answer.

Rife means frequently or commonly occurring; widespread. Its opposite is capricious, meaning subject to caprices; tending to change abruptly and without apparent reason; erratic. Hence, (D) is the answer.

Ballast is anything giving stability and firmness to character, human relations. Insanity is the state of being insane; mental illness or derangement. Hence, (1) is the answer.

Remunerate means to pay or compensate (a person) for (work or service done, loss incurred, etc.); reward; recompense. Its opposite is mulct, meaning to punish by a fine or by depriving of something; penalize, reprove. Hence, (C) is the answer.

Petulant mans impatient or irritable, esp. over a petty annoyance; peevish. Its opposite is copacetic, meaning Very satisfactory or acceptable; fine. Hence, (A) is the answer.