"Maudlin" means self-pityingly or weakly sentimental, often through drunkenness. It describes excessive emotionality and tearfulness. The correct antonym is "Stoic," which means enduring pain and hardship without showing one's feelings or complaining; emotionally reserved and unresponsive to sentimental displays.

"Squalid" means extremely dirty and unpleasant, especially as a result of poverty or neglect; wretched or filthy. The correct antonym is "Pristine," which means in its original condition; unspoiled or perfectly clean, fresh, or pure.

"Onerous" means involving an amount of effort and difficulty that is burdensome or oppressive; it implies a task that is severely demanding. The correct antonym is "Effortless," which means requiring no physical or mental exertion; easy.

"Virulent" means extremely severe or harmful in its effects, often used to describe a disease or poison, but also used figuratively for bitterly hostile feelings. The correct antonym is "Innocuous," which means not harmful or offensive; harmless.

"Vivacious" means full of life and energy; attractively lively and animated. The correct antonym is "Insipid," which means lacking vigor, interest, or distinctive character; dull or lifeless.

"Wary" means feeling or showing caution about possible dangers or problems; it implies being vigilant and careful. The correct antonym is "Heedless," which means showing a careless lack of attention or not paying attention; unmindful.

"Zealous" means having or showing great energy or enthusiasm in pursuit of a cause or objective; it implies passion and fervor. The correct antonym is "Apathetic," which means showing or feeling no interest, enthusiasm, or concern; indifferent.

"Wistful" means having or showing a feeling of vague or regretful longing; it suggests a sad, thoughtful desire. The correct antonym is "Blithe," which means showing a casual and cheerful indifference considered to be improper; it implies a happy, carefree, and unconcerned state.

"Zephyr" refers to a soft, gentle breeze. The correct antonym is "Gale," which is defined as a very strong wind.

"Arduous" means requiring great effort, labor, or exertion; difficult and tiring. The most direct opposite is "Facile," which means easily achieved, effortless, or simple.