/ˈmɛtəfɔːr/
[noun] A way of describing something by saying it is something else, used to show that the two things share a quality. For example, saying 'life is a journey' is a metaphor.
Every time you say someone has a 'sharp mind', you are borrowing a word that originally meant physically carrying something across a river.
The word 'metaphor' travels a surprisingly physical road before arriving at its modern, literary meaning. It begins in ancient Greek with the verb 'pherein', meaning 'to carry' or 'to bear'. To this root, Greek speakers attached the prefix 'meta-', which meant 'over', 'across', or 'beyond'. The result was 'metapherein', a verb meaning literally 'to carry across' or 'to transfer'. From this verb came the noun 'metaphora', meaning a transfer or a carrying-over — the idea of moving something from one place to another.
The ancient Greeks, particularly Aristotle in his fourth-century BCE work 'Poetics', used 'metaphora' in a precise rhetorical sense: the act of transferring the name of one thing onto another thing, so that qualities travel across the gap between them. When a poet called the sea 'the wine-dark deep', they were performing a 'metaphora' — carrying a quality from one world (wine, darkness, richness) and placing it onto another (the ocean). Aristotle considered the ability to make good metaphors a sign of natural genius, something that could not be taught.
The word moved from Greek into Latin as 'metaphora', keeping its form almost perfectly intact, a sign of how completely Roman writers adopted Greek rhetorical vocabulary. Latin grammarians used it widely in texts about rhetoric and style, and it was in this scholarly, literary context that the word survived through the medieval period. Latin 'metaphora' then passed into Old French as 'métaphore', which is the form that English writers eventually encountered.
English adopted 'metaphor' in the late 15th and early 16th centuries, during the Renaissance, a period when scholars were eagerly recovering and translating classical Greek and Latin texts. The word appears in English writing from around 1533, used by writers discussing the art of poetry and persuasion. Its arrival was part of a great flood of classical vocabulary that reshaped the English language during this era — words borrowed not from everyday speech but from the books of ancient thinkers.
What is remarkable about 'metaphor' is how perfectly its own history illustrates its meaning. The word is itself a metaphor: it takes the physical, concrete act of carrying something across a space and uses it to describe the mental, abstract act of transferring meaning between ideas. The 'pherein' root, meaning 'to carry', is also hidden inside several common English words that arrived through different routes: Greek 'pherein' → Latin 'ferre' → Old French 'offrir' → English 'offer'; and Greek 'diapherein' → Latin 'differre' → Old French 'différer' → English 'differ'. The same ancient root for carrying is also visible in 'ferry', which came from Old English 'ferian', itself descended from the same Proto-Germanic ancestor that shares a distant kinship with the Greek 'pherein'.
Over the centuries, 'metaphor' has grown from a technical term used by scholars into an everyday word. Today people use it casually — 'that's just a metaphor' — without any awareness of its Greek past. Yet that past gives the word a wonderful depth. Every metaphor, in the original sense, is a small act of transportation: something is lifted from its familiar home and carried somewhere new, and in that crossing, both the thing carried and the place it arrives are changed.