Why We Publish “Origin Unknown”

Readers occasionally write to tell us that an entry has let them down. They came for the story of where a phrase comes from, and what they got, in so many words, was: nobody is sure. It feels like a shrug. It reads like a writer who did not do the work. We want to explain, once and clearly, why “origin unknown” appears as often as it does on this site, and why we regard it not as a gap in the research but as one of its results.

The appeal of the tidy acronym

Consider the word “posh.” Everyone has heard that it stands for “port out, starboard home” — the shaded, cooler cabins that wealthy passengers supposedly booked on the sea route to India and back. It is a wonderful story: specific, class-conscious, faintly glamorous. It is also almost certainly false. As the reference specialists and the fact-checkers at Snopes have both documented, the “port out, starboard home” explanation cannot be traced earlier than the 1930s, by which point “posh” was already in ordinary use, and no shipping ticket or company record has ever been found stamped with the supposed acronym. The tidy story arrived after the word and was fitted to it.

This is the single most common shape of a bad etymology: the backronym, an acronym invented retrospectively to explain a word whose real history is murkier. Acronym origins are almost always modern; a word that predates the twentieth century almost never began as initials. Yet backronyms spread beautifully, because they convert a vague mystery into a crisp anecdote, and a crisp anecdote is what people repeat. Our job is frequently to disappoint them.

CANOE and the pull of a good story

Word people have a name for the wider phenomenon: CANOE, the Committee to Ascribe a Naval Origin to Everything. It is a joke, but it names a real bias. Vivid, concrete origins — a ship’s rope, a hangman’s noose, a soldier’s ammunition belt — out-compete dull, uncertain ones in the marketplace of retelling, regardless of which is true. “The whole nine yards” is the textbook case: attached, with total confidence, to the belt of a wartime fighter plane, and demolished by the plain evidence that the phrase appears in American newspapers well before such aircraft existed, sometimes as “the whole six yards.” A false origin does not have to be plausible to win. It only has to be repeatable.

Once you have watched this happen a few dozen times, you develop a reflex. When an origin story is suspiciously neat — when it snaps shut with a satisfying click — that neatness is itself a warning. Real linguistic history is usually messier, slower and harder to pin to a single dramatic moment.

The first-citation trap

There is a subtler reason we hedge, and it applies even to our most rigorous sources. The great historical dictionaries record the earliest surviving written use of a word or phrase. That is invaluable, but it is not the same as the moment of invention. Most language is spoken for years, sometimes generations, before anyone writes it down, and most of what was written has not survived. So an earliest citation is a floor, not a birth certificate: it tells us the phrase existed by a certain date, not that it began then, and certainly not that the author quoted invented it.

This is why we are cautious even about our most beloved sources. A great deal of what gets attributed to Shakespeare, as the Library of Congress’s folklorists have pointed out, is really proverb and common speech that he happened to be the first to have printed and preserved. The same trap catches the King James Bible, and any famous, heavily-quoted text: fame attracts citations, and citations get mistaken for origins. Worse, the floor keeps moving. As more old books, letters and newspapers are digitised and searched, earliest-known dates are pushed back constantly, and yesterday’s confident coinage becomes today’s “well, actually, someone wrote it thirty years earlier.” An honest site has to be built to survive that revision, which means not staking its credibility on origin claims the evidence cannot bear.

The company that unknown keeps

It helps to remember how much good company “origin unknown” is in. “To let the cat out of the bag” is everywhere explained by the naval cat-o’-nine-tails or by a market swindle involving a piglet — and neither has any evidence behind it; the phrase surfaces in print around 1760 with its parentage genuinely lost. Even “OK,” one of the most successful words English has ever exported, has attracted a small museum of confident origin stories — a Choctaw affirmative, a Boston newspaper’s jokey abbreviation of “all correct,” a president’s home town, a docker’s cargo mark — and while scholars now favour one of these, the graveyard of the rejected candidates is a monument to how eagerly we invent pedigrees for words we cannot quite place. If the biggest word of all can wear a dozen false origins, a humbler phrase can certainly wear none we can prove.

What “origin unknown” actually means here

So when we publish “origin unknown,” or “origin uncertain,” we are not confessing that we gave up. We are reporting a specific state of the evidence, and it usually means one of a few precise things:

• The earliest uses we can find give no hint of how the phrase arose, and every proposed explanation is a later guess rather than contemporary testimony.
• Several origin stories circulate, and none has documentary support — in which case saying “it may derive from X” would give a rumour the dignity of a finding.
• The trail simply runs cold before the phrase does, as trails often do.

In each case, the phrase “origin unknown” carries real information: it tells you the popular story you have heard is unproven, and it tells you not to repeat it as fact. That is a more useful thing to know than a confident fabrication, even if it is less fun at a dinner party.

In practice this shapes how we write every entry. We start from the earliest datable uses we can actually find, not from the story that circulates; we treat a vivid explanation as a claim to be tested rather than a conclusion to be decorated; and we grade our own confidence in plain words — “from,” when the record is firm, “probably” or “likely” when it leans one way, and “unknown” when it will not lean at all. Where sources disagree, we would rather show you the disagreement than hide it behind a clean sentence. None of this makes for the punchiest anecdote, and we have made our peace with that.

Our standard, in the end, is simple to state and occasionally painful to apply. We would rather tell you what we do not know than tell you something false that you will enjoy. When the evidence supports a firm origin, we give it, with the citation. When it supports a likelihood, we say “probably,” and show our reasoning. And when it supports nothing better than a shrug, we publish the shrug — honestly labelled, because a well-documented “we don’t know” is not the absence of scholarship. It is the whole point of it.