die-hard
adjectiveUK /ˈdaɪ.hɑːd/
US /ˈdaɪ.hɑːrd/
Someone who never gives up on what they love or believe in.
She is a die-hard fan of that band and goes to every concert.
RELATED WORDS
OTHER MEANINGS
2. Refusing to change an opinion or habit even when it causes trouble.
He is a die-hard traditionalist who still writes letters by hand.
3. A person who strongly resists change or new ideas.
The die-hards in the club voted against every new rule.
4. Lasting or continuing stubbornly to the very end.
Their die-hard effort finally saved the old library.