Today yore survives almost only in two frames: of yore and days of yore. As a noun it names a time long past, the kind of past that feels older than living memory. Dictionaries mark it poetic or archaic. Journalism still borrows it as a mild costume — postal services of yore, boardrooms of yore — but the free word has left ordinary speech.
The origin of the word yore is native English, not a loan. It is year, inflected, then frozen.
An Old English adverb built from year
Old English already used ġeāra, often spelled geara, as an adverb meaning formerly, of old, long since. The form is the genitive plural of ġēar, the everyday word for year. In a language with case endings, of years could stand alone as a time adverb. Speakers did not put a preposition in front. The ending did the work that later English does with years ago or in years past.
That adverb appears in Bede, in the Old English Genesis, and in Beowulf: treasures given ġeāra, words spoken ġeāra in youth. The sense is already remoteness, not a tally of calendar years. A speaker who said ġeāra was not counting twelve-month spans. The genitive had already become a way to point backward.
Most modern dictionaries treat this as settled. Merriam-Webster and the American Heritage Dictionary both derive the later English word from Old English gēara, the genitive plural of gēar. The same account is the usual one in etymological handbooks. Wiktionary is slightly more cautious and calls the Proto-Germanic genitive reconstruction probable rather than certain. The caution is about the reconstructed ancestral form, not about the English line. No serious account treats the word as a borrowing from French or Latin.
The opening sound is the same palatal ġ that gives English its y in year, yesterday, and yellow. What looks like a modern y was a palatalized g in Old English spelling. The rest of the form is the old plural stem plus a genitive ending. There is no extra prefix and no hidden second root.
Middle English inherited the adverb under many spellings: yore, yor, yare, ȝore, ȝare, ȝeare, even gare. The Middle English Dictionary points them back to Old English gēara, gēaro, gēare, and gāre. By that stage the adverb could mean long ago, previously, for a long time already, or across a long stretch of time. A handful of early forms sit close to the adverb ere, and the dictionary notes some confusion in the manuscripts. That is a spelling overlap, not a second etymology.
How the adverb became a noun
The adverb is older. From about the mid-fourteenth century English also used yore as a noun meaning the past. Merriam-Webster dates the noun, in the sense still listed today, to that century. Once a noun existed, of yore looked like any other prepositional phrase, and days of yore hardened into a set piece. Old English had not needed the preposition of; Middle and Modern English put it back in, as if the old genitive had never done that work.
The standalone adverb then faded. Writers of the late sixteenth century could still use yore by itself for long ago, but that use is obsolete. What remains is the noun, and even the noun barely appears except inside the inherited phrases. The path is a textbook fossil: a living Old English adverb, a Middle English noun, then a couple of fixed expressions that keep the word in print.
The meaning did not travel far. Yore never named a single year, a school year, or a span of twelve months. It always pointed at distance. Register is what changed. In Old English the adverb was ordinary narrative past. In present-day English the same stock sounds deliberately antique. Knights of yore are not dated to a reign. They are placed in a past the writer wants to feel older than recollection.
That is why the surviving phrases do a double job. Of yore still means in the past, but it also signals a tone. The writer is not locating an event in 1485. The writer is asking the reader to picture a before that has already become story.
The Germanic year, and a distant cousin in hour
Because yore is the old genitive of year, its deeper history is the history of year. Old English ġēar in the West Saxon dialect, ġēr in Anglian, comes from Proto-Germanic *jērą. That is usually traced to a Proto-Indo-European word for year or season, reconstructed as *yóh₁r̥ or *yer-. One widely cited guess is that the root first named a complete cycle, a thing done all the way around. That last step is a reconstruction, not a meaning anyone wrote down.
Germanic relatives of year are close at hand: German Jahr, Dutch jaar, Old Norse and modern Scandinavian ár and år, Gothic jēr, Old Saxon and Old High German jar. Further out, Avestan yare means year. Greek hōra covers year, season, and a part of the day, and through Latin hora it gives English hour. Slavic languages keep related words for spring. Latin hornus means of this year. The family is about turning seasons, not about clocks.
English year and hour are often described as doublets: one arrival through Germanic, one through Greek and Latin. Yore belongs only to the Germanic line. It never passed through hora. It is year inflected and then left standing.
The morphology is therefore plain once you look for a case ending rather than a prefix. Folk stories that would tie the word to your, yawning, or yew do not hold. The historical parts are year plus a genitive plural, used as an adverb, then recast as a noun for the past.
A related modern coinage, yesteryear, looks similar on the page and is not the same formation. That word joins yester- to year in a later, transparent compound. Yore is older grammar, not a clipped form of yesteryear.
The grammar still showing through
The useful takeaway is grammatical. Days of yore is not a nineteenth-century flourish invented to sound medieval. It is what is left of an Old English genitive that already meant of years, long before English required the word of. The modern phrase looks like a preposition plus a noun because Middle English rebuilt it that way. Under the rebuild, the noun is still that old plural of year, pointing at seasons that have already gone around.