19 Longest Words in the World 

From made-up words in movie musicals to the names of German laws and hills in New Zealand, the origins of some of the world’s longest words may surprise you! Some of their etymologies are more fun than you’d guess! Let’s explore some of the longest words in the world, where they came from, and what they mean.

Methionylthreonylthreonylglutaminylarginyl…isoleucine

No. of Letters: 189,000,000 
Language: English 
Country: United States

Methionylthreonylthreonylglutaminylarginyl…isoleucine is the longest word in the world, with a whopping 189,000,000 letters! It is the scientific name for the protein titin, specifically the largest protein in the striated muscle tissue of humans and other vertebrates. The term was named and comprehensively described by scientists at the University of Texas at Austin. 

Some people think this word shouldn’t be on the list of the longest words in the world because it’s a scientific name.

Related:

Nirantarāndhakāritā … lokān

No. of Letters: 195 
Language: Sanskrit 
Country: India 

Nirantarāndhakāritā … lokān is a Sanskrit word from a 16th-century text coined by Tirumalãmbã, Queen of Vijayanagara. It describes a region near Kanci or Kanchipuram, a district in what is now the South Indian state of Tamil Nadu. This term describes the area’s welcoming people and natural beauty.

Taumatawhakatangihangakoauauotamateaturipukakapikimaungahoronukupokaiwhenuakitanatahu

No. of Letters: 85 
Language: Maori
Country: New Zealand 

This is the longest place name in the world. It is a hilltop outside a small New Zealand village called Pōrangahau, Central Hawkes Bay, Aotearoa/New Zealand. It literally means “the hilltop where Tamatea, the man with the big knees, conqueror of mountains, eater of land, traveler over land and sea, played his kōauau (flute) to his beloved.” The location is registered as a historical site and waahi tapu (“sacred place”) with Heritage New Zealand.

Rindfleischetikettierungsüberwachungsaufgabenübertragungsgesetz 

No. of Letters: 63
Language: German
Country: Germany

This famous German compound word means “Cattle marking and beef labeling supervision duties delegation law.” It was officially the longest German word from 1999 to 2013. Believe it or not, this is the short version of the law’s name, but the longer official version is not a compound word.

Lentokonesuihkuturbiinimoottoriapumekaanikkoaliupseerioppilas

No. of Letters: 61 
Language: Finnish 
Country: Finland 

This is believed to be the longest word in the Finnish language! If you translate this word to English, it means “airplane jet turbine engine auxiliary mechanic non-commissioned officer student.”

Pinakanakakapagngitngitngitngitang-Pagsisinungasinungalingan

No. of Letters: 60 
Language: Tagalog 
Country: Philippines 

This is the longest word in the Philippines. It translates to “lying that causes the most extreme anger.” It’s another compound word from the words “ngitngít,” meaning “anger, rage or fury,” and “sinungaling,” meaning “lie or a liar.”

Kindercarnavalsoptochtvoorbereidingswerkzaamhedenplan

No. of Letters: 53 
Language: Dutch 
Country: The Netherlands 

The longest word in Dutch means “preparation activities for a children’s carnival procession.” Like its linguistic neighbor, German, the Dutch language uses quite a few of these compound words. However, the term for the same concept in German, “Kinderkarneval Prozession Vorbereitungsplan,” is split into three words.

Pneumoultramicroscopicossilicovulcanoconiótico

No. of Letters: 46 
Language: Spanish
Country: Spain 

This is the Spanish translation of the English word “pneumonoultramicroscopicsilicovolcanoconiosis,” another contender for the longest word in the English language. It’s the scientific name for a lung condition called silicosis, which comes from breathing in very fine silicate or quartz dust.  

Pneumonoultramicroscopicsilicovolcanoconiosis

No. of Letters: 45 
Language: English 
Country: United States

This word is the scientific name for the lung disease silicosis. The first recorded use of the word was in the 1930s in The New York Herald-Tribune.

Hippopotomonstrosesquippedaliophobia

No. of Letters: 36 
Language: English
Country: United States or the United Kingdom

This term for “fear of long words” was originally shorter but was changed, probably to make it more intimidating. If you have this phobia, getting to this point on the list is very brave! Psychologists don’t usually recognize this as a medical phobia. Instead, it’s usually treated as some kind of anxiety disorder.

Supercalifragilisticexpialidocious

No. of Letters: 34 
Language: English 
Country: United States 

“The biggest word you’ve ever heard” from Disney’s Mary Poppins was made famous by Julie Andrews and Dick Van Dyke’s performance of the song of the same name. According to the song, it’s a word to use when you don’t know what to say! If Mary Poppins is a British character, why is the United States this word’s country of origin? This word was made up by Richard and Robert Sherman, the film’s songwriters, not Mary Poppins’ creator P.L. Travers. 

Pseudopseudohypoparathyroidism

No. of Letters: 30
Language: English 
Country: United States 

This word describes a rare inherited condition that can cause short stature, round face, and short hand bones. It also causes soft tissue to harden. 

Floccinaucinihilipilification

No. of Letters: 29 
Language: English
Country: England

Usually only used as a curiosity, this word means estimating something as valueless. It combines four Latin prefixes meaning “nothing.” Since the construction is based on the rules for teaching Latin used at Eton College, a British boarding school, this word likely originated there in the 18th century as a schoolboy joke!

Antidisestablishmentarianism 

No. of Letters: 28
Language: English 
Country: United Kingdom 

This word means opposition to removing a legally established state church’s legal status. It originated in the 19th century in the United Kingdom and was used to describe people who wanted to keep the Church of England as the legally recognized state church. 

Honorificabilitudinitatibus

No. of Letters: 27 
Language: Latin
Country: Somewhere in Europe, Recorded in Early Modern England

This is the longest word Shakespeare ever used, which means the state of earning or being worthy of honors. This word may be Latin, but you probably wouldn’t have heard it in ancient Rome. Most linguists think this word was coined in medieval Europe, where scholars, nobility, and the clergy used Latin too. 

Precipitevolissimevolmente

No. of Letters: 26 
Language: Italy 
Country: Italian 

This Italian adverb means “hastily” or “in a hurry” – literally “very precipitously.” It is the longest word in the Italian language and was invented by a poet in 1677. It has eleven syllables, so it is a complete verse in the Italian poetic tradition!

Anticonstitutionnellement

No. of Letters: 25 
Language: French
Country: France

This French word just means “unconstitutionally” in English! At 25 letters, this is one of the shorter words on this list, but it’s generally regarded as the longest in French. 

Thyroparathyroidectomized 

No. of Letters: 25 
Language: English
Country: United States 

This adjective means having undergone a thyroparathyroidectomy or removal of the thyroid and parathyroid glands in your neck. These parts  help regulate energy levels. You can tell this is American rather than British English because it uses the suffix “-ized” instead of “-ised.”

Pseudohypoparathyroidism

No. of Letters: 24
Language: English 
Country: United States 

Capping our list of longest words in the world is another genetic disease similar to pseudopseudohypoparathyroidism. The symptoms are similar, but people with pseudohypoparathyroidism show resistance to parathyroid hormone that regulates growth and energy levels. 

People with pseudohypoparathyroidism inherit the gene that causes it from their mother, while people who develop pseudopseudohypoparathyroidism inherit the gene from their father.