• Doctrinaire

    Origin

    Borrowing from fr {{2}} doctrinaire, from doctrine + -aire.

    Full definition of doctrinaire

    Noun

    doctrinaire

    (plural doctrinaires)
    1. A person who stubbornly holds to his or her philosophy or opinion regardless of its feasibility.

    Adjective

    doctrinaire

    1. stubbornly holding on to an idea without concern for practicalities or reality.
    © Wiktionary