a. unable to compromise about points of doctrine; unyielding
Weng had hoped that the student-led democracy movement might bring about change in China, but the repressive response of the doctrinaire hard liners crushed his dreams of democracy.
Sentence in Classic:
Their fathers in the flesh had been, either royalists, doctrinaires, it matters not what; this confusion anterior to themselves, who were young, did not concern them at all; the pure blood of principle ran in their veins.
Les Misérables (V3) By Victor Hugo Context