Meaning: disappear or change very slowly, take a long time to cease to exist or be dropped from consideration.
Noun: a person who displays such resistance or loyalty.
Example 1: Die hard boarders are snatching up second homes here, but so far it has managed to stay affordable.
Example 2: Die-hard football enthusiasts were planning the rebirth of a town team.
Example 3: On the morning of my visit, a few die-hards were setting up a small fund-raising event at the ground.