"You don't know the definition of immortal!"
"Actually, being immortal means the exact opposite of being immortal."
The audacity of this sassenach.
Immunity to death is the fundamental definition of immortality.
Immortal means "not mortal".
What is a "mortal"?
A "mortal" is a being that is subject to death.
The origins of the word goes back to Mors, the Roman personification of death. Mortal, mortalis, mort, mors. It all has to do with death.
If a mortal is subject to death, an immortal is not subject to death.
It is literally in the name.
If a living being can die in any way then they are subject to death and thus not immortal.
Now are you going to continue being obtuse about this after seeing numerous definitions and an explanation on the very origin of the word?