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diehard

[dahy-hahrd] / ˈdaɪ hɑrd /
NOUN
overenthusiastic person
Synonyms
STRONGEST
fanatic fundamentalist zealot
STRONG
bourbon extremist fogy mossback praetorian pullback reactionary right right-winger rightist stick-in-the-mud ultraconservative
WEAK
bitter ender dyed-in-the-wool intransigent old liner standpat standpatter true blue

Example Sentences

Examples are provided to illustrate real-world usage of words in context. Any opinions expressed do not reflect the views of Dictionary.com.

“I’m more than worried. I’m nervous. I’m scared,” said Tavárez, born in Los Angeles to parents from Jalisco and a diehard fan of the Mexican national team.

From Los Angeles Times • Feb. 25, 2026

As for everyone else, including her most diehard critics, she hopes they can still appreciate her fiction.

From The Wall Street Journal • Jan. 31, 2026

The Athletic added in a Friday report that the two negotiators “remain far apart” on their respective demands, frustrating the YouTube TV viewers who make up “some of the most diehard NFL fans anywhere.”

From Slate • Nov. 10, 2025

These diehard subcommunities centered around outre fashion, indie pop and stylish photography took to Grimes, knowing it allowed them to finally become fans of themselves.

From Salon • Nov. 7, 2025

Its biggest tune, ‘Nessun dorma’, was incredibly popular, not just with a few diehard fans but rather with just about everyone who heard it.

From "The Story of Music" by Howard Goodall