名詞 polemic:

1. a writer who argues in opposition to others (especially in theology)
   同義詞：polemicist, polemist
2. a controversy (especially over a belief or dogma)

形容詞 polemic:

1. of or involving dispute or controversy
   同義詞：polemical

1. He launched into a fierce polemic against the government's policies.
   他猛烈地抨擊政府的政策。

po.lem.ic

n.（名詞）
A controversial argument, especially one refuting or attacking a specific opinion or doctrine.
辯論，激烈的爭辯：一場爭辨性的討論，尤指用來駁倒或攻擊某一特定觀點或信條的爭論
A person engaged in or inclined to controversy, argument, or refutation.
辯論者；爭辯者：從事或喜歡爭辯、辯論或駁斥的人
adj.also （形容詞） 也作
polemical
Of or relating to a controversy, an argument, or a refutation.
辯論的，爭辯的：屬于或關(guān)于一個爭論、辯論、或駁斥的

來源：
French polémique
法語 polémique
from Greek polemikos [hostile]
源自 希臘語 polemikos [敵意的]
from polemos [war]
源自 polemos [戰(zhàn)爭]

【引伸】
polem.ically
adv.（副詞）