"Polemical" refers to something that is strongly critical or argumentative. The opposite would be "conciliatory," meaning intended to placate or reconcile, bringing peace rather than conflict.

Opposite words: Amiable, Cordial, Conciliatory, Gracious, Compliant. 

"Palliate" means to alleviate or ease symptoms without curing the cause. The opposite is "aggravate," which means to make a situation worse or intensify it.

Opposite words: Worsen, Intensify, Exacerbate, Compound, Magnify, Amplify, Augment.

"Pride" refers to a high sense of personal worth or dignity. The opposite would be "submission," which refers to yielding or giving in, often out of humility.

Opposite words: Disgrace, Odium, Opprobrium, Stigma, Slur.

"Loquacious" describes someone who talks a lot. The opposite is "taciturn," meaning reserved, silent, or reluctant to speak.

Opposite words: Laconic, Taciturn, Reticent, Quiet.

"Hilarious" refers to something extremely funny or causing great laughter. The opposite is "despondent," meaning feeling downhearted, hopeless, or in a state of sadness.

Opposite words: Serious, Somber, Solemn, Poignant, Sober, Lachrymose.

"Arrhythmic" means without rhythm or irregular in pattern. The opposite is "regularity," which refers to consistency or the state of occurring in a predictable and rhythmic manner.

Opposite words: Uniform, Rhythmical, Musical, Regular.

"Acrimonious" refers to a harsh or bitter attitude, often involving angry disputes. The opposite is "amicable," which means friendly, good-natured, and characterized by a spirit of kindness.

Opposite words: Mild, Warm, Sympathetic.

"Tranquil" means calm, peaceful, and free from disturbance. The opposite would be "agitated," which refers to being disturbed, upset, or in a state of excitement or unrest.

Opposite words: Noisy, Agitated, Raucous, Tempestuous, Perturbed, Distressed.

"Bona-fide" refers to something that is genuine or real. The opposite would be "counterfeit," meaning fake or fraudulent.

Opposite words: Artificial, Counterfeit, Fake, Synthetic, Spurious, Bogus, Sham.

"Dispute" refers to a disagreement or argument. The opposite would be "accept," meaning to agree with or acknowledge something.

Opposite words: Agreement, Accord, Compliance, Embrace, Accept.