diehard

Meanings

Plural: diehards

Noun

• one who adheres to traditional views
• A person with such an attitude.

Adj

• Unreasonably or stubbornly resisting change.
• Fanatically opposing progress or reform.
• Complete; having no opposite opinion of anything in a particular topic of one's values; thorough of in one's beliefs.
• Strongly or fanatically determined or devoted.

Synonyms

traditionalist