> Immortal doesn’t mean indestructible. It just means they don’t age.
Technically “immortal” means “never dying”, it has nothing to do with age. You could be unable to die but continue to age and become ever more decrepit (although the Oxford dictionary does list “never decaying” in its definition), for sure there’s a sci-fi short story about that out there.
The mentioned creatures all age, they do get older, it just so happens their bodies don’t deteriorate, or they do but regenerate.
That’s the second paragraph. I was specifically addressing only the first (the one I quoted). In that one you seem to be saying that “immortal means not aging”. That’s the only part of your post I wanted to address, the rest was very clear.
Technically “immortal” means “never dying”, it has nothing to do with age. You could be unable to die but continue to age and become ever more decrepit (although the Oxford dictionary does list “never decaying” in its definition), for sure there’s a sci-fi short story about that out there.
The mentioned creatures all age, they do get older, it just so happens their bodies don’t deteriorate, or they do but regenerate.