Using the Latin root mort meaning death and the prefix im meaning not, the meaning of immortality as used in this sentence from the passage most likely means A) being dead. B) having morals. C) ending in death. D) unending existence. Using the Latin root mort meaning death and the prefix im meaning not, the meaning of immortality as used in this sentence from the passage most likely means A) being dead. B) having morals. C) ending in death. D) unending existence.