/ɪˌmɔːrˈtælɪti/
[noun] The state of living or lasting forever, without ever dying or being forgotten. It can describe a living being that cannot die, or the lasting fame of a person, idea, or work of art.
The word 'immortality' is built on the Latin word for death — making it literally the negation of dying, not the presence of living.
At the heart of 'immortality' lies the Latin word 'mors', meaning death. This ancient root gave Latin the adjective 'mortalis', meaning 'subject to death' — a word that carried a quiet sadness, acknowledging that all living things must one day end. From 'mortalis', Latin formed 'immortalis' by adding the prefix 'im-', a variation of 'in-', which reversed the meaning entirely. 'Immortalis' therefore meant simply 'not subject to death'. The abstract noun 'immortalitas' followed naturally, referring to the condition of being beyond death's reach.
The Latin root 'mors' is itself ancient, tracing back to the Proto-Indo-European root *mer-, meaning to die or to wear away. This prehistoric root spread across many languages over thousands of years. In Sanskrit it became 'marana', meaning death. In Greek it produced 'brotos', meaning mortal, which combined with the prefix 'a-' (not) to give 'ambrotos', meaning immortal — the origin of the word 'ambrosia', the legendary food of the Greek gods that granted eternal life. These parallel developments show how deeply the concept of mortality — and its opposite — was woven into ancient human thought.
English received 'immortality' through Old French, which had inherited the Latin tradition. Latin 'immortalitas' passed into Old French as 'immortalité', and from there crossed into Middle English during the 14th century, at a time when French vocabulary was flooding into English following the Norman Conquest of 1066. English speakers adopted the word with its meaning largely intact, using it first in religious and philosophical writing to describe the soul's endless existence after death.
Over time, however, the word's meaning expanded beyond its strictly spiritual origins. By the Renaissance, writers were applying 'immortality' to fame and creative legacy — the idea that a great poet, painter, or hero could live forever through their work and reputation. Shakespeare used the concept repeatedly, and in doing so helped cement 'immortality' as both a religious and a cultural aspiration. A soldier who died bravely, a writer whose books endured — both could claim a kind of immortality, even without divine intervention.
What makes the word quietly remarkable is that it is entirely constructed around absence. 'Immortality' does not describe what something is — it describes what it is not. It is the negation of 'mortality', and mortality is the negation of life's continuation. In this way, the word works like a double mirror: life defined by its ending, and then that ending removed. Today, the word appears in science fiction discussions about technology and ageing, in philosophy, in religion, and in everyday speech whenever someone says a great musician has achieved immortality — each use still carrying the shadow of that ancient Latin word for death, 'mors', quietly buried at its core.