/rɪˈfɜːr/
[verb] To mention or direct attention to something or someone, or to send a person to another source for help or information.
Every time you 'refer' to something, you are literally carrying it back to its starting point.
The word 'refer' travels to us in remarkably good condition from classical Latin. Its immediate ancestor is the Latin verb 'referre', which was built from two parts: the prefix 're-', meaning 'back' or 'again', and 'ferre', meaning 'to carry' or 'to bear'. So at its heart, 'refer' means something like 'to carry back' — to return something, whether a physical object or a piece of information, to its original place or source. This same root 'ferre' is one of the hardest-working roots in the entire Latin language, and its descendants are everywhere in English.
The Latin 'ferre' had a past participle form, 'latum', which gave rise to a whole separate family of English words. The compound 'transferre' (to carry across) became the English 'transfer', following the path Latin transferre → Old French transferer → English transfer. Similarly, 'conferre' (to bring together) gave us 'confer', and 'inferre' (to carry into, to bring about) passed through Latin inferre → Old French inferer → English 'infer'. Each of these preserves that same ancient idea of carrying something from one place to another.
English borrowed 'refer' directly from Latin 'referre' in the late 14th century, during a period when educated writers and clergymen were drawing heavily on Latin for precise vocabulary. The earliest English uses carried the Latin sense closely: to bring or hand something back, or to submit a matter to another authority for a decision. You could 'refer' a legal dispute to a judge, meaning you were placing it back in the hands of someone with power over it. This official, administrative flavour clung to the word for centuries.
Over time, the meaning grew lighter and more general. By the 16th and 17th centuries, writers were using 'refer' to mean simply mentioning something in speech or writing — pointing the reader's or listener's attention toward a person, fact, or text. The physical image of 'carrying back' had faded, but the underlying logic survived: when you refer to a book or a person, you are directing attention back to that source, as if returning to it. The word 'reference', formed in the same period from the same Latin root, followed the same path and settled comfortably beside it.
One of the most interesting branches of this family tree is the word 'fertile', which also descends from 'ferre' — because fertile soil was seen by the Romans as soil that 'bears' or 'carries' crops: Latin fertilis → Old French fertile → English fertile. And 'suffer' comes from Latin 'sufferre' (to carry from below, to bear up under), which moved through Old French sofrir before entering English. Even 'offer' traces back through Old French offrir to Latin 'offerre', meaning 'to carry toward'. The humble act of referring, then, connects you to a vast web of English words all rooted in the ancient human act of carrying things from place to place.