Antonyms

Viscid means sticky, adhesive, or having a thick glue-like consistency. Loose means not firmly or tightly attached, which is the opposite of something that is sticky or adhesive.

A warmonger is someone who advocates or promotes war and conflict. A pacifist is someone who opposes war and advocates for peaceful resolution, making them direct opposites.

A savant is a learned person, especially someone with detailed knowledge in a specialized field. Unlearned means lacking knowledge or education, which is the opposite of being knowledgeable or scholarly.

Adhere means to stick to, remain attached to, or follow closely (like adhering to rules). Detach means to separate or disconnect, which is the direct opposite of attaching or sticking to something.

Steep, when referring to prices or quantities, means to soak or immerse, but can also mean to increase sharply. Plummet means to fall or drop rapidly, which opposes the idea of rising or increasing sharply.

Pinch can mean a small amount or scarcity (as in "a pinch of salt" or "in a pinch" meaning barely enough). Abundant amount means plentiful or copious, which is the opposite of a small or meager amount.

Hyperbole is exaggerated statements or claims not meant to be taken literally. Understatement is the deliberate presentation of something as smaller or less important than it actually is, making it the direct opposite.

Aver means to state or assert to be true, to affirm confidently. Deny means to declare untrue or refuse to admit, which is the direct opposite of affirming or asserting something.

Supine means lying face up or metaphorically lazy/indifferent. Vigilant means being watchful and alert, which is the opposite of a supine attitude.

Extemporaneous means unplanned, therefore planned is correct.

Tranquility means being calm, peaceful, and free from disturbance. Pandemonium means wild and noisy disorder or chaos, making it the direct opposite.

Flourish means to grow well, thrive, or be in a state of active growth. 'Lack of substance' suggests emptiness or hollowness, which is the opposite of flourishing with substance.