The word aid means help or provide support. The opposite of aid is to make things harder for someone else. Because hamper means hold back or hinder, so hamper is the correct choice.

The word barren means unproductive or incapable of creating offspring. Land is barren if it cannot produce fruit or vegetation. The opposite of barren is being able to create life. Because fertile means capable of producing vegetation, it is the correct option.

The word optimistic means tending to expect favorable outcomes. The opposite of optimistic is pessimistic or expecting unfavorable outcomes. Because cynical means bitterly distrusting or pessimistic, it is correct.

The word consequential means of importance. The opposite of consequential is unimportant. Because trivial means of very little importance, it is correct.

The word revealed means made known or visible. Something is revealed if it was once hidden but now is not hidden. The opposite of revealed is hidden or not open to view. Because obscured means concealed or hidden, this is correct.

Boast means to talk with excessive pride and self-satisfaction about one's achievements, possessions, or abilities. Belittle means 'to dismiss (someone or something) as unimportant or of low value' which is the opposite of boast. Hence, its the correct answer.

Affluence means abundant wealth, i.e. in large amounts which is opposite to the meaning of paucity.

The word meager means scanty or inadequate. The opposite of meager is adequate or plentiful. Because copious means plentiful, it is opposite to meager, hence correct.

It is correct because it means lacking brightness or interest; drearily dull.. This is the opposite of gaudy. The word gaudy means flashy or showy. The opposite of gaudy is subdued or muted. Because drab means dull or lacking in color, this option is correct.

Stingy means unwilling to give or spend; ungenerous, which is opposite of philanthropy. Hence, is the right option.

This is correct because grim means very serious or gloomy. The word cheery means gay in spirits or happy in disposition. The opposite of cheery is something negative such as depressed or saddened. Because melancholy means sad or gloomy, this is correct.

It is correct because refute means to prove (a statement or theory) to be wrong or false The word verify means to make sure that something is true or accurate. The opposite of verify is to prove that something is not true or accurate. Because invalidate means to discredit or render something inaccurate or erroneous, it is correct.

It means to make or feel less, whereas augment means to increase, which is opposite. Hence correct answer.

The word chide means to scold or rebuke. The opposite of chide is to praise. Because laud means to praise, the choice it is correct.

The word wan means pale and weak. The opposite of wan is flush and healthy. Because glowing means showing the radiance of health, it is correct.

Apathy means lack of interest, enthusiasm, or concern about something whereas perseverance means steadfastness in doing something despite difficulty or delay in achieving success. This is the opposite, hence correct.

Support means to give approval, comfort, or encouragement which is the opposite to invalidate which means make or prove (an argument, statement, or theory) unsound or erroneous. Hence a correct answer.

The word ingenious means clever, intelligent, or inventive. The opposite of ingenious is not clever or intelligent. Because inane means stupid or silly, it is correct.

-

The word mutilate means to disfigure violently. The opposite of mutilate is to repair or improve the appearance. Because mend means to repair something broken or damage, it is correct.

The word amplify means to increase in size or effect. The opposite of amplify is to decrease in size or effect. Because lessen means to decrease, it is correct.

Insipid means lacking in flavor whereas pungent means having a sharply strong taste or smell which is opposite to insipid. Hence, the correct answer.

The word succinct means expressed in few words. The opposite of succinct is expressed in a lot of words. Because wordy means characterized by the use of too many words, it is correct. The word succinct means expressed in few words. The opposite of succinct is expressed in a lot of words. Because wordy means characterized by the use of too many words, it is correct.

The word deprecate means to belittle or express disapproval. The opposite of deprecate is to praise or express approval of. Because commend means to express praise, this is correct option.

Garrulous means excessively talkative whereas reserved means slow to reveal emotion or opinions which is the opposite. Hence, correct option.

The word amass means to gather together or accumulate over time. The opposite of amass is to divide or donate. Because disperse means to distribute or spread, it is correct option. The word amass means to gather together or accumulate over time. The opposite of amass is to divide or donate. Because disperse means to distribute or spread, it is correct option.

Salutation is an expression of greeting, goodwill, or courtesy by word, gesture, or ceremony whereas adieu means a goodbye, which is opposite to salutation. Hence, a correct option. Salutation is an expression of greeting, goodwill, or courtesy by word, gesture, or ceremony whereas adieu means a goodbye, which is opposite to salutation. Hence, a correct option.

The word antagonist means a person who competes with another, especially the protagonist or main character in a story. The opposite of antagonist is, then, the main character or protagonist. Because a hero is the main male character of a story and, generally, a person celebrated for bravery, this is a correct option.

The word odious means repugnant or deserving hate. The opposite of odious is undeserving of hate. Because palatable means acceptable or agreeable, it is correct option.

The word altruism means unselfish concern for the well being of others. The opposite of altruism is selfishness. Because malevolence means wishing evil or harm to others it is correct option.

Paramount means more important than anything else whereas trivial means of  little value or importance which is opposite, hence, the correct answer.

The meaning of diligent is having or showing care and conscientiousness in one's work or duties whereas careless means not providing proper attention to something or someone, so it is opposite to diligent. Hence, a correct answer.

The word repulsion means the state of wanting to repel or reject something. The opposite of repulsion is to be drawn to something or to desire something. Because attraction is the state of drawing one in or being alluring, it is the correct option.

Frugal means sparing or economical with regard to money or food whereas lavish means give someone generous amounts of something. This is the opposite of frugal and the correct answer.

Trepidation is a feeling of fear or agitation about something that may happen whereas assurance means a positive declaration intended to give confidence which is its opposite. Hence, a correct option.

Treason means the action of betraying someone or something whereas devotion means love, loyalty, or enthusiasm for a person, activity, or cause which is opposite to treason. Therefore it is the right option. Treason means the action of betraying someone or something whereas devotion means love, loyalty, or enthusiasm for a person, activity, or cause which is opposite to treason. Therefore it is the right option.

Gruesome means causing repulsion or horror; extremely unpleasant whereas pleasing means to feel happy and satisfied which is opposite. Hence the correct option.

Exhaustion means a state of extreme physical or mental fatigue where as vigor is physical strength and good health which is opposite. Hence a correct option.

Turgid means tediously pompous or bombastic or enlarged beyond norm whereas modest means unassuming or moderate in the estimation of one's abilities or achievements which is the opposite. Hence, a correct option. Turgid means tediously pompous or bombastic or enlarged beyond norm whereas modest means unassuming or moderate in the estimation of one's abilities or achievements which is the opposite. Hence, a correct option.

Limber means flexible which is opposite to inflexible. Hence it is the correct option.