diehard
[noun]
Synonyms: bitter-ender, conservative, fundamentalist, old liner, praetorian, pullback, right, rightist, right wing, right-winger, standpat, standpatter, tory, reactionary, Blimp, Bourbon, Colonel Blimp, reactionarist, reactionist, royalist, ultraconservative, white

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Contrasted words: liberal, progressive, radical
Related Words: mossback, old fogy, stick-in-the-mud, intransigent, true blue, right-center

[TahlilGaran] English Synonym Dictionary ▲

die‧hard /ˈdaɪhɑːd $ -hɑːrd/ noun [countable]
someone who opposes change and refuses to accept new ideas
—diehard adjective:
a few diehard fans
⇒ old habits die hard at die¹(9)

[TahlilGaran] Dictionary of Contemporary English ▲