Antonyms

Blustering means to say noisily and aggressively and gentle means pleasant/tender/mild.
 

Reckless means acting without thinking of consequences. Cautious is the opposite, meaning careful and aware of potential risks.

Brittle means hard but liable to break easily. Elastic means able to resume its normal shape after being stretched or compressed, which is the opposite of breaking.

Lame means crippled/weak. Trusted means dependable and tone down means to fade/darken. Bold means to show lack of reserve/to make intense... e.g. bold colours, etc.Subdued means to make less intense/ timid, etc. So, correct antonym is bold.

Timorous means showing or suffering from nervousness, fear, or a lack of confidence. Courageous is the opposite, meaning brave.

Confutation means the act of proving something to be false. Evidence is the opposite in this context, as it supports the truth of a claim.

Pungent means having a sharply strong taste or smell. Insipid means lacking flavor or vigor, which is the direct opposite.

Plenitude means an abundance or a large amount. Inefficiency is a poor antonym here, but among the choices, it is the only one that represents a lack or failure of a positive state, though 'scarcity' would be a better antonym.

Prosaic means commonplace, unromantic, or dull. Romantic is the opposite, as it implies imagination, emotion, and adventure.

Acquiescent means ready to accept something without protest. Tenacious means tending to keep a firm hold of something or being persistent, which is the opposite of yielding.

Bigotry is the obstinate or unreasonable attachment to a belief or opinion, often with prejudice. Tolerance is the opposite, meaning the willingness to accept opinions or behaviors one dislikes.

Vice is an immoral or wicked behavior. Virtue is moral excellence or goodness, which is the direct opposite.

A tyro is a beginner or novice. A virtuoso is a person highly skilled in music or another artistic pursuit, which is the opposite.

Respite is a short period of rest or relief from something difficult. Exertion is the application of effort or physical activity, which is the opposite.

Eventual means occurring at the end of or as a result of a process. Preliminary means denoting an action or event preceding or preparing for something more important, which is the opposite.

Converge means to come together from different directions. Diverge is the opposite, meaning to move or draw apart in different directions.

Conceited means to be self centered whereas modest is the opposite.

 Scatter means to spread things out in a random manner. Accumulate means to gather things together and therefore is antonymous with scatter.

Helter-skelter describes a state of disorder, confusion, or haste. Arranged implies order and organization, making it the correct antonym.

Ephemeral refers to something lasting for a very short time. Perpetual means never-ending or changing, which is the direct opposite.

Elegance refers to grace, style, or beauty. Ugliness is the quality of being unpleasant or unattractive, serving as the antonym.

It means lacking vitality....so, opposite is vivacious.

Detestable means deserving intense dislike. Exquisite means extremely beautiful or pleasant, making it the antonym.

Exult means to show or feel triumphant elation. Lament means to express grief or sorrow, which is the opposite.