Answer and explanation:
From the root "mort" meaning death, we have the adjective mortal, which means someone who is subject to death or something that is fatal (causes death).
By adding the prefix "im", meaning not, to mortal, we have the adjective "immortal". If mortal is someone who is subject to death, an immortal person is someone who isn't, who cannot die, whose existence cannot be finished.
Immortality is the condition or quality of being immortal. If you have immortality, you have an unending existence, eternal life.
