polemic
US /pəˈlem.ɪk/
UK /pəˈlem.ɪk/

1.
a strong verbal or written attack on someone or something
:
•
His book was a fierce polemic against the government's policies.
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The article was a strong polemic in favor of environmental protection.
1.
of or relating to a polemic; involving dispute or controversy
:
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His writing style is often described as highly polemic.
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The debate became increasingly polemic as the evening progressed.