Antonyms

To malign means to vilify; to slander; to libel. Its opposite is to venerate, meaning to honour; to revere.

Mandatory means compulsory. Its opposite is optional.

The intended antonym is 'cheap' as something with low monetary value. However, 'worthless' would be more precise. 'Expensive' is actually a synonym of valuable. 'Unvaluable' is not a standard word, and 'non-valuble' is both misspelled ('valuable') and not standard. The question tests basic opposites in the context of monetary worth.

Censure is to criticize and commend is to praise.

An epicure is someone who enjoys and appreciates fine food, so the opposite would be someone indifferent to food. Option D directly contrasts the food-loving nature of an epicure. Options A, B, C are unrelated - epicures are not about art ignorance, dedication to causes, or greed.

Pristine means in original condition, pure, unspoiled or clean. The opposite would be contaminated, polluted or impure. Option E correctly identifies contaminated as the antonym. Options like ruthless, seductive, coarse, or commonplace are not true opposites of pristine.

CONVERSANCE means familiar to something.

Levy is to collect a payment and rescind is to cancel.

In physics, inertia is the tendency of an object to resist changes in its state of motion (to remain at rest or in uniform motion). The opposite would be a tendency to change motion - something that actively seeks movement or change. Option E correctly identifies this as the opposite.

Nadir means the lowest point, rock bottom, or the point of greatest despair/decline. The opposite would be the topmost point, zenith, or peak. Option D correctly identifies topmost point as the antonym. Nadir and zenith are direct opposites in describing positions.

A reactant is a substance that actively participates in a chemical reaction. The opposite would be an inert material that does not react or participate in chemical processes. Option C correctly identifies inert material as the antonym.

Ebullience means high spirits, enthusiasm, excitement, and exuberant energy. The opposite would be calm restraint - composed, controlled behavior without excitability. Option E correctly identifies calm restraint as the antonym. Other options like pomposity or awkwardness are not true opposites.

Commodious : spacious Cramped : do not have enough space to move (eg. cramped room).

Recant means abjue, and affirm is to keep a belief.

Stock means something common, standard, or ordinary - like stock sizes or stock phrases. Unique means one-of-a-kind, which is the direct opposite.