Attitudinarian

Part of speech: noun

Pronunciation: /ˌætɪˌtjuːdɪˈnɛəɹi.ən/

Definitions

1. A person who unwaveringly clings to a fixed mindset or belief system
2. An individual marked by a steadfast commitment to certain attitudes or beliefs without openness to differing perspectives
3. Someone who firmly holds on to a particular attitude or belief without considering alternative views

Etymology: The word is built from "attitude" and the suffix "-arian," which marks a person associated with a particular doctrine or stance, as in "unitarian" or "humanitarian." "Attitude" itself reaches English from Italian "attitudine," which traces back through Latin to "aptitudo," a noun meaning fitness or aptness, formed from "aptus" ("fitted, suitable") and the suffix "-tudo." Those origins are a long way from the sense of a stubborn stance, since the original idea was of something being fitted or arranged for a purpose. The chain of meaning matters here. "Attitude" entered English in the sense of a bodily posture, and only later took on the sense of a mental disposition. Adding "-arian" then turned that disposition into a label for the person who holds it, and the resulting noun carries the flavour of someone who will not budge from a set position.

Synonyms: dogmatist, ideologue, partisan, zealot

Antonyms: open-minded, indifferent