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Rebecca O'Connell

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

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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. 

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Beyond “Buffalo buffalo”: 9 Other Repetitive Sentences From Around The World
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Famously, in English, it’s possible to form a perfectly grammatical sentence by repeating the word buffalo (and every so often the place name Buffalo) a total of eight times: Buffalo buffalo Buffalo buffalo buffalo buffalo Buffalo buffalo essentially means “buffalo from Buffalo, New York, who intimidate other buffalo from Buffalo, New York, are themselves intimidated by buffalo from Buffalo, New York.” But repetitive or so-called antanaclastic sentences and tongue twisters like these are by no means unique to English—here are a few in other languages that you might want to try.

1. “LE VER VERT VA VERS LE VERRE VERT” // FRENCH

This sentence works less well in print than Buffalo buffalo, of course, but it’s all but impenetrable when read aloud. In French, le ver vert va vers le verre vert means “the green worm goes towards the green glass,” but the words ver (worm), vert (green), vers (towards), and verre (glass) are all homophones pronounced “vair,” with a vowel similar to the E in “bet” or “pet.” In fact, work the French heraldic word for squirrel fur, vair, in there somewhere and you’d have five completely different interpretations of the same sound to deal with.

2. “CUM EO EO EO EO QUOD EUM AMO” // LATIN

Eo can be interpreted as a verb (“I go”), an adverb ("there," "for that reason"), and an ablative pronoun (“with him” or “by him”) in Latin, each with an array of different shades of meaning. Put four of them in a row in the context cum eo eo eo eo quod eum amo, and you’ll have a sentence meaning “I am going there with him because I love him.”

3. “MALO MALO MALO MALO” // LATIN

An even more confusing Latin sentence is malo malo malo malo. On its own, malo can be a verb (meaning “I prefer,” or “I would rather”); an ablative form of the Latin word for an apple tree, malus (meaning “in an apple tree”); and two entirely different forms (essentially meaning “a bad man,” and “in trouble” or “in adversity”) of the adjective malus, meaning evil or wicked. Although the lengths of the vowels differ slightly when read aloud, put all that together and malo malo malo malo could be interpreted as “I would rather be in an apple tree than a wicked man in adversity.” (Given that the noun malus can also be used to mean “the mast of a ship,” however, this sentence could just as easily be interpreted as, “I would rather be a wicked man in an apple tree than a ship’s mast.”)

4. “FAR, FÅR FÅR FÅR?” // DANISH

Far (pronounced “fah”) is the Danish word for father, while får (pronounced like “for”) can be used both as a noun meaning "sheep" and as a form of the Danish verb , meaning "to have." Far får får får? ultimately means “father, do sheep have sheep?”—to which the reply could come, får får ikke får, får får lam, meaning “sheep do not have sheep, sheep have lambs.”

5. “EEEE EE EE” // MANX

Manx is the Celtic-origin language of the Isle of Man, which has close ties to Irish. In Manx, ee is both a pronoun (“she” or “it”) and a verb (“to eat”), a future tense form of which is eeee (“will eat”). Eight letter Es in a row ultimately can be divided up to mean “she will eat it.”

6. “COMO COMO? COMO COMO COMO COMO!” // SPANISH

Como can be a preposition (“like,” “such as”), an adverb (“as,” “how”), a conjunction (“as”), and a verb (a form of comer, “to eat”) in Spanish, which makes it possible to string together dialogues like this: Como como? Como como como como! Which means “How do I eat? I eat like I eat!”

7. “Á Á A Á Á Á Á.” // ICELANDIC

Á is the Icelandic word for river; a form of the Icelandic word for ewe, ær; a preposition essentially meaning “on” or “in;” and a derivative of the Icelandic verb eiga, meaning “to have,” or “to possess.” Should a person named River be standing beside a river and simultaneously own a sheep standing in or at the same river, then that situation could theoretically be described using the sentence Á á á á á á á in Icelandic.

8. “MAI MAI MAI MAI MAI” // THAI

Thai is a tonal language that uses five different tones or patterns of pronunciation (rising, falling, high, low, and mid or flat) to differentiate between the meanings of otherwise seemingly identical syllables and words: glai, for instance, can mean both “near” and “far” in Thai, just depending on what tone pattern it’s given. Likewise, the Thai equivalent of the sentence “new wood doesn’t burn, does it?” is mai mai mai mai mai—which might seem identical written down, but each syllable would be given a different tone when read aloud.

9. “THE LION-EATING POET IN THE STONE DEN” // MANDARIN CHINESE

Mandarin Chinese is another tonal language, the nuances of which were taken to an extreme level by Yuen Ren Chao, a Chinese-born American linguist and writer renowned for composing a bizarre poem entitled "The Lion-Eating Poet in the Stone Den." When written in its original Classical Chinese script, the poem appears as a string of different characters. But when transliterated into the Roman alphabet, every one of those characters is nothing more than the syllable shi:

Shíshì shīshì Shī Shì, shì shī, shì shí shí shī.
Shì shíshí shì shì shì shī.
Shí shí, shì shí shī shì shì.
Shì shí, shì Shī Shì shì shì.
Shì shì shì shí shī, shì shǐ shì, shǐ shì shí shī shìshì.
Shì shí shì shí shī shī, shì shíshì.
Shíshì shī, Shì shǐ shì shì shíshì.
Shíshì shì, Shì shǐ shì shí shì shí shī.
Shí shí, shǐ shí shì shí shī shī, shí shí shí shī shī.
Shì shì shì shì.

The only difference between each syllable is its intonation, which can be either flat (shī), rising (shí), falling (shì) or falling and rising (shǐ); you can hear the entire poem being read aloud here, along with its English translation.

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'Froyo,' 'Troll,' and 'Sriracha' Added to the Merriam-Webster Dictionary
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Looking for the right word to describe the time you spend drinking before heading out to a party, or a faster way to say “frozen yogurt?" Merriam-Webster is here to help. The 189-year-old English vocabulary giant has just added 250 new words and definitions to their online dictionary, including pregame and froyo.

New words come and go quickly, and it’s Merriam-Webster’s job to keep tabs on the terms that have staying power. “As always, the expansion of the dictionary mirrors the expansion of the language, and reaches into all the various cubbies and corners of the lexicon,” they wrote in their announcement.

Froyo is just one of the recent additions to come from the culinary world. Bibimbap, a Korean rice dish; choux pastry, a type of dough; and sriracha, a Thai chili sauce that’s been around for decades but has just recently exploded in the U.S., are now all listed on Merriam-Webster's website.

Of course, the internet was once again a major contributor to this most recent batch of words. Some new terms, like ransomware (“malware that requires the victim to pay a ransom to access encrypted files”) come from the tech world, while words like troll ("to harass, criticize, or antagonize [someone] especially by provocatively disparaging or mocking public statements, postings, or acts”) were born on social media. Then there’s the Internet of Things, a concept that shifts the web off our phones and computers and into our appliances.

Hive mind, dog whistle, and working memory are just a few of the new entries to receive the Merriam-Webster stamp of approval. To learn more about how some words make it into the dictionary while others get left out, check these behind-the-scenes secrets of dictionary editors.

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