the.com/undying
Death tried to RSVP; this thing left it on read forever.
means Never ending or dying, used for things that last eternally — usually love, loyalty, fame, or hope.
from Old English, the negative 'un-' bolted onto 'dying' — literally refusing the verb most verbs end at. In use since the 1300s.
Poet's favoriteBeloved word for love, fame, and devotion clichés.
Not literalAlmost always metaphor, rarely actual immortality.
Sibling wordDeathless says the same thing, colder.