Formidable =of discouraging or awesome strength, size, difficulty, etc.;intimidating.

Intimidating = to make timid; fill with fear.

Forbidding = grim; unfriendly; hostile; sinister, dangerous threatening.

Foreboding = a strong inner feeling or notion of a future misfortune, evil, etc.; presentiment.

Lulling = calm or send to sleep, typically with soothing sounds or movements.

Initiating = causing (a process or action) to begin.

Option D is correct.

Intended or likely to placate or pacify is called conciliatory

Contentious refers to anything causing or likely to cause an argument

Pacific means peaceful in character or intent

Combative means ready or eager to fight or argue

Truculent means eager or quick to argue or fight; aggressively defiant.

Hence, option B is the correct answer.

Stymie means to prevent or hinder the progress of something.

Behest refers to a person's orders or command.

Fledgeling means inexperienced, or underdeveloped.

Cramp means to inhibit the development of.

Tacit means understood or implied without being stated.

Hence option C is the correct answer.

Turbulent = characterized by conflict, disorder, or confusion; not stable or calm. 

Tranquil = free from disturbance; calm. 

Lineage = direct descent from an ancestor. 

Ethereal = extremely delicate and light in a way that seems not to be of this world. 

Nubile = sexually attractive

So, option A is the correct answer.

Disclose = allow (something hidden) to be seen. 

Conceal = prevent (something) from being known; keep secret. 

Determined = having made a firm decision and being resolved not to change it. 

Relish = to enjoy greatly. 

Relinquish = voluntarily cease to keep or claim. 

Wreck = destroy or severely damage.

Consortium (n.): an association, typically of several companies. 

Segregation (n.): the action or state of setting someone or something apart from others.

Consociation (n.): a political system formed by the cooperation of different, especially antagonistic, social groups on the basis of shared power.

Sequestration (n.): an act of segregation from others; isolation:

Calumniation (n.): a false accusation of an offense or a malicious misrepresentation of someone's words or actions. 

Quarantine (n.): a period or state of enforced isolation (especially to prevent spread of a disease).

So, the correct answer is option B.

Wailing = to make a long loud high cry because you are sad or in pain moan; crying.

Prevailing = existing at a time; current. 

Aloof = not friendly or forthcoming.

Haggard = looking ill or tired, often with dark skin under eyes. 

Bitter = full of anger and harsh feelings.

Rescind = means revoke, cancel or repeal a law, order or agreement.

Repeal = revoke or annul (a law or act of parliament). 

Blunder = a stupid or careless mistake. 

Caricaturing = make or give a caricature of.

Abort = to end. 

Bold = standing out in a very noticeable way.

Hence, option B is the correct response.

Devastating = highly destructive or damaging. 

Comforting = means to console someone in distress or grief.

Disrespectful = showing a lack of respect or courtesy; impolite. 

Invigorating = making one feel strong, healthy and full of energy. 

Enduring = lasting over a period; durable. 

Shimmering = shining with a soft, slightly wavering light.

Assertion = a confident and forceful statement of fact or belief. 

Denial = a statement that something is not true. 

Fervent = having or displaying a passionate intensity. 

Sanctify = make an event or place holy. 

Bolt = move or run away suddenly, typically from fear. 

Immerse = involve oneself deeply in a activity.