What's the Longest Word in the World? Here are 12 of Them, By Category

Rebecca O'Connell
Rebecca O'Connell

Antidisestablishmentarianism, everyone’s favorite agglutinative, entered the pop culture lexicon on August 17, 1955, when Gloria Lockerman, a 12-year-old girl from Baltimore, correctly spelled it on The $64,000 Question as millions of people watched from their living rooms. At 28 letters, the word—which is defined as a 19th-century British political movement that opposes proposals for the disestablishment of the Church of England—is still regarded as the longest non-medical, non-coined, nontechnical word in the English language, yet it keeps some robust company. Here are some examples of the longest words by category.

1. METHIONYLTHREONYLTHREONYGLUTAMINYLARGINYL … ISOLEUCINE 

Note the ellipses. All told, the full chemical name for the human protein titin is 189,819 letters, and takes about three-and-a-half hours to pronounce. The problem with including chemical names is that there’s essentially no limit to how long they can be. For example, naming a single strand of DNA, with its millions and millions of repeating base pairs, could eventually tab out at well over 1 billion letters.

2. LOPADOTEMACHOSELACHOGALEOKRANIOLEIPSAN …P TERYGON

The longest word ever to appear in literature comes from Aristophanes’ play, Assemblywomen, published in 391 BC. The Greek word tallies 171 letters, but translates to 183 in English. This mouthful refers to a fictional fricassee comprised of rotted dogfish head, wrasse, wood pigeon, and the roasted head of a dabchick, among other culinary morsels. 

3. PNEUMONOULTRAMICROSCOPICSILICOVOLCANOCONIOSIS

At 45 letters, this is the longest word you’ll find in a major dictionary. An inflated version of silicosis, this is the full scientific name for a disease that causes inflammation in the lungs owing to the inhalation of very fine silica dust. Despite its inclusion in the dictionary, it’s generally considered superfluous, having been coined simply to claim the title of the longest English word.

4. PARASTRATIOSPHECOMYIA STRATIOSPHECOMYIOIDES 

The longest accepted binomial construction, at 42 letters, is a species of soldier fly native to Thailand. With a lifespan of five to eight days, it’s unlikely one has ever survived long enough to hear it pronounced correctly.

5. PSEUDOPSEUDOHYPOPARATHYROIDISM

This 30-letter thyroid disorder is the longest non-coined word to appear in a major dictionary.

6. FLOCCINAUCINIHILIPILIFICATION

By virtue of having one more letter than antidisestablishmentarianism, this is the longest non-technical English word. A mash-up of five Latin roots, it refers to the act of describing something as having little or no value. While it made the cut in the Oxford English Dictionary, Merriam-Webster volumes refuse to recognize it, chalking up its existence to little more than linguistic ephemera.

7. SUBDERMATOGLYPHIC

At 17 characters, this is the longest accepted isogram, a word in which every letter is used only once, and refers to the underlying dermal matrix that determines the pattern formed by the whorls, arches, and ridges of our fingerprints. 

8. SQUIRRELLED

Though the more commonly accepted American English version carries only one L, both Oxford and Merriam-Webster dictionaries recognize this alternate spelling and condone its one syllable pronunciation (think “world”), making it the longest non-coined monosyllabic English word at 11 letters.

9. ABSTENTIOUS

One who doesn’t indulge in excesses, especially food and drink; at 11 letters this is the longest word to use all five vowels in order exactly once.

10. ROTAVATOR 

A type of soil tiller, the longest non-coined palindromic word included in an English dictionary tallies nine letters. Detartrated, 11 letters, appears in some chemical glossaries, but is generally considered too arcane to qualify.

11. and 12. CWTCH, EUOUAE

The longest words to appear in a major dictionary comprised entirely of either vowels or consonants. A Cwtch, or crwth, is from the Welsh word for a hiding place. Euouae, a medieval musical term, is technically a mnemonic, but has been accepted as a word in itself. 

Why 'Run' Is The Most Complex Word in the English Language

iStock.com/VectorStory
iStock.com/VectorStory

English can be hard for other language speakers to learn. To use just one example, there are at least eight different ways of expressing events in the future, and conditional tenses are another matter entirely. For evidence of the many nuances and inconsistencies of the English tongue, look no further than this tricky poem penned in 1920. (For a sample: “Hiccough has the sound of cup. My advice is to give up!”)

As author Simon Winchester wrote for The New York Times, there’s one English word in particular that’s deceptively simple: run. As a verb, it boasts a record-setting 645 definitions. Peter Gilliver, a lexicographer and associate editor of the Oxford English Dictionary, spent nine months sussing out its many shades of meaning.

“You might think this word simply means ‘to go with quick steps on alternate feet, never having both or (in the case of many animals) all feet on the ground at the same time,’” Winchester writes. “But no such luck: that is merely sense I.1a, and there are miles to go before the reader of this particular entry may sleep.”

This wasn’t always the case, though. When the first edition of the Oxford English Dictionary was published in 1928, the word with the most definitions was set. However, the word put later outpaced it, and run eventually overtook them both as the English language's most complex word. Winchester thinks this evolution is partly due to advancements in technology (for instance, “a train runs on tracks” and “an iPad runs apps”).

He believes the widespread use of run—and its intricate web of meanings—is also a reflection of our times. “It is a feature of our more sort of energetic and frantic times that set and put seem, in a peculiar way, sort of rather stodgy, rather conservative,” Gilliver told NPR in an interview.

So the next time you tell your boss you "want to run an idea" by them, know that you’re unconsciously expressing your enthusiasm—as well as all the other subtleties wrapped up in run that previous words like set failed to capture.

[h/t The New York Times]

11 Little-Known Words for Specific Family Members

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iStock.com/kali9

The words we use for family members in English are specific about some things, and vague about others. Our vocabulary marks a distinction between our mother and her sisters (some languages use one word for mother and maternal aunts), but doesn't say whether siblings are older or younger (some languages have different words for brother and sister depending on their age relative to you). We lack words that pick out particular family members (we have cousin, but what about child-of-my-father's-brother?) as well as certain general terms (we have siblings for brothers-and-sisters, but what about nieces-and-nephews?)

If you look hard enough, you can find some words to help fill in the gaps. Here are 11 unusual English kinship words for family members.

1. Patruel

This one means "child of your paternal uncle." Also, a child of your own brother. It hasn't gotten a lot of use in the past few centuries, but it was once convenient to have a term for this relationship because it factored into royal succession considerations. The first citation for it in the OED, from 1538, reads, "Efter his patruell deid withoutin contradictioun he wes king."

2. Avuncle

Your mother's brother. Latin distinguished between patruus, father's brother, and avunculus, mother's brother. (There was also amita, father's sister, and matertera, mother's sister.) It's the root of the word avuncular, meaning "having to do with uncles" or "uncle-like" (i.e., kind and friendly, like an uncle). You won't find the word avuncle in the dictionary, but it has been used in anthropology texts and in papers concerning royal matters.

3. Niblings

Your nieces and nephews. You won't find this in the dictionary either, but use of this term seems to be growing among favorite aunts and uncles who want an easy way to refer to their little bundles of sibling-provided joy in a collective or gender-neutral way.

4. Fadu

Your father's sister. Latin amita covers this relationship, but we don't have to reach that far back to find an English equivalent. Old English made a distinction between aunts and uncles depending on whether they were maternal or paternal. We lost all that when we borrowed the more general aunt and uncle from French.

5. Modrige

"Your mother's sister," from Old English.

6. Fœdra

"Your father's brother," from Old English.

7. Eam

Your mother's brother. It survived in some dialects as eme, with a more general meaning of uncle or friend, into the 19th century.

8. Brother-uterine

Your half-brother from the same mother. This is a term used in old legal documents or other discussions of inheritance and succession. Half-siblings of the same mother are uterine and of the same father are consanguine.

9. Brother-german

Full brother, sharing both parents. Nothing to do with Germany. The german here is related to germane, which originally meant "of the same parents" and later came to mean just related or relevant.

10. Double cousin

Full first cousin, sharing all four grandparents. This comes about when a pair of sisters marries a pair of brothers, among other circumstances.

11. Machetonim

The parents of your child's spouse. Your child's in-laws. Ok, this is a Yiddish word, but one that, like a lot of Yiddish words, has poked its way into English because it fills a gap. When it comes to marriage, this can be a very important relationship, so it’s good to have a word for it. If your parents get along with their machetonim, the family—the whole mishpocheh—will be happier.

This story was republished in 2019.

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