diehard
UK: ˈdaɪ.hɑːd | US: ˈdaɪ.hɑːrd
n. 1. A person who stubbornly resists change or clings to a particular cause or belief despite opposition.
adj. 2. Stubbornly resisting change or adhering to a belief.
The term originated in the early 19th century, originally describing soldiers who fought stubbornly to the death. The metaphorical extension to describe unwavering loyalty or resistance emerged later. "Die" reflects literal or figurative persistence, while "hard" emphasizes unyielding determination. The word's evolution mirrors its literal roots in battlefield tenacity to broader contexts of steadfastness.
He’s a diehard fan of the team, never missing a game.
The diehard conservatives opposed the new policy.
Despite criticism, she remained a diehard supporter of the cause.
The diehard rebels refused to surrender.
His diehard attitude made compromise impossible.