The term often conveys a deep, emotional connection to something, such as a hobby or interest. Her diehard love for the book series made her visit each filming location.
Pro Tip 2/3
Resistance to Change
Used to describe someone who refuses to stop supporting something, even when faced with changes or new evidence. Despite the team's losing streak, he remained a diehard fan.
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Defiance Against Odds
Suggests someone who continues to hold their position even when the situation is unlikely to improve. She was a diehard competitor, finishing the race despite her injury.