名詞 extremist:

1. a person who holds extreme views

形容詞 extremist:

1. (used of opinions and actions) far beyond the norm
   同義詞：radical, ultra

1. He was blacklisted because of his extremist views.
   他因觀點偏激而被列入黑名單。
2. It is unlikely that such an extremist organization will remain quiescent for long.
   這種過激的組織是不太可能長期沉默的。
3. All staff are vetted for links with extremist groups before being employed.
   所有職員錄用前均須審查是否與極端分子團體有關(guān)。
4. I do dislike having her extremist ideas rammed down my throat.
   我十分厭惡她強加於我的那些偏激觀念。
5. The extremists have formed a splinter group outside the main party.
   那些極端主義者在大黨外已組成了分裂出來的小派別。

ex.trem.ist

n.（名詞）
One who advocates or resorts to measures beyond the norm, especially in politics.
極端分子：過分地提倡或憑借某措施的人，尤指在政治上

【引伸】
extrem.ism
n.（名詞）
extrem.ist
adj.（形容詞）