{"id":148634,"date":"2023-05-16T15:59:13","date_gmt":"2023-05-16T19:59:13","guid":{"rendered":"https:\/\/www.fluentu.com\/blog\/learn\/longest-word-in-english\/"},"modified":"2025-02-17T04:14:29","modified_gmt":"2025-02-17T09:14:29","slug":"longest-word-in-english","status":"publish","type":"post","link":"https:\/\/www.fluentu.com\/blog\/english\/longest-word-in-english\/","title":{"rendered":"The Longest Words in the English Language"},"content":{"rendered":"

The longest word in the English language<\/strong>\u00a0is “pneumonoultramicroscopicsilicovolcanoconiosis.”<\/p>\n

Try saying that quickly five times!<\/p>\n

In this post we\u2019ll explore some of the longest words in English, plus teach you how to break them down so that you can pronounce them easily.<\/p>\n

[fluentu-toc]<\/p>\n

<\/p>\n

Longest Word in English: Pneumonoultramicroscopicsilicovolcanoconiosis<\/h2>\n

Letters:<\/strong> 45<\/p>\n

Definition (noun):<\/strong> Lung disease caused by breathing in dust or volcanic ash<\/p>\n

The patient is experiencing signs of p<\/strong>neumonoultramicroscopicsilicovolcanoconiosis\u00a0<\/strong>after hiking near the site of a volcanic eruption.<\/em><\/p>\n

This is the longest word that exists in the English language<\/a>. As with other long words, you should be patient and break it down into its individual components.<\/p>\n

As you can see below, knowing the parts of this word will be especially helpful for anyone studying English in an academic, scientific or medical environment.<\/p>\n

Essential word parts: <\/strong>Pneumo- <\/strong>(lung), microscopic-<\/strong> (small), coni-<\/strong> (particles) and a suffix: -osis\u00a0<\/strong>(often indicates a disease).<\/p>\n

More Long Words in English<\/h2>\n

\"longest<\/a><\/p>\n

We will show you the essential parts of these long words that can help you learn the word itself and other English words. We will\u00a0specifically note common English prefixes and suffixes to pay attention to.<\/p>\n

Methionylthreonylthreonylglutaminylalanyl…isoleucine<\/h3>\n

Letters:<\/strong> 189,819<\/p>\n

Definition (noun):<\/strong> Chemical composition of “titin,” which is the largest known protein in the body\u00a0\u00a0<\/p>\n

This word has taken some people around 2-3.5 hours to pronounce! Amazing, isn’t it? It’s not, however, considered the longest word in English\u2014because it’s not in a dictionary.\u00a0<\/p>\n

Essential word parts: <\/strong>Amino acid residues that make up the protein. These include methionine, threonine, glutamine, alanine and isoleucine.<\/p>\n

Floccinaucinihilipilification<\/h3>\n

Letters:<\/strong> 29<\/p>\n

Definition (noun):<\/strong> Deciding that something has no value<\/p>\n

Since my wallet was becoming so huge, I took a few minutes for some\u00a0floccinaucinihilipilification<\/strong>\u00a0of all the old cards I was keeping in there.<\/em><\/p>\n

This is one of those complex words that seems made up. It was formed from various Latin words and can still be confusing to understand after breaking it down.<\/p>\n

Essential word part: <\/strong>Nihili-<\/strong> (nothing)<\/p>\n

Incomprehensibility<\/h3>\n

Letters:<\/strong> 19<\/p>\n

Definition (noun):<\/strong> Impossible to understand<\/p>\n

The incomprehensibility<\/strong> of the word made people question its meaning.<\/em><\/p>\n

This word has common prefixes and suffixes that you will see in many other English words. Plus, you may already be familiar with more basic forms of this word, such as\u00a0incomprehensible<\/em> (adjective \u2014 impossible to understand)<\/p>\n

Essential word parts: <\/strong>include a prefix in-<\/strong> (not), a root word prehend<\/strong> (from the Latin for “grasp”) and a suffix: –ity<\/strong> (suffix used to form a noun out of an adjective).<\/p>\n

Surreptitious<\/h3>\n

Letters:<\/strong> 13<\/p>\n

Definition (adjective):<\/strong> Secret, stealthy<\/p>\n

The robbers were surreptitious<\/strong> as they stole the jewels.<\/em><\/p>\n

This word is used fairly regularly among native English speakers. It is one of the less complex long English words.<\/p>\n

Essential word part: <\/strong>Prefix: sur-<\/strong> (under, below)<\/p>\n

Uncharacteristically<\/h3>\n

Letters:<\/strong> 20<\/p>\n

Definition (adverb):<\/strong> Not typical<\/p>\n

The star basketball player uncharacteristically<\/strong> missed the game-winning shot.<\/em><\/p>\n

Here is another fairly standard word that helps you practice both a common prefix and suffix.<\/p>\n

Essential word parts: <\/strong>Prefix: un-<\/strong> (not) and a suffix: -ly<\/strong> (used to form an adjective)<\/p>\n

Supercalifragilisticexpialidocious<\/h3>\n

Letters:<\/strong> 34<\/p>\n

Definition (adjective):<\/strong> Especially wonderful<\/p>\n

The sun is shining and all is right in the world. It is a supercalifragilisticexpialidocious<\/strong> day.<\/em><\/p>\n

Essential word parts: <\/strong>Cali-<\/strong> (beauty).<\/p>\n

Subdermatoglyphic<\/h3>\n

Letters:<\/strong> 17<\/p>\n

Definition (adjective):<\/strong> Pertaining to the layer of the skin beneath the fingertips<\/p>\n

The\u00a0subdermatoglyphic<\/strong>\u00a0state of everyone’s fingerprints are different.<\/em><\/p>\n

This word is extremely rare<\/a>, and may be more interesting to linguists than to medical professionals. That is because it is a very long isogram<\/em>, or a word that does not repeat any letters.<\/p>\n

Essential word parts: <\/strong>Prefix: sub-<\/strong> (under, below \u2014 similar to “sur-“), derma-<\/strong> (skin) and a suffix: -ic<\/strong> (used to form an adjective).<\/p>\n

Abstentious<\/h3>\n

Letters: <\/strong>11<\/p>\n

Definition (adjective):<\/strong> Self-restraining<\/p>\n

You never have trouble sticking to your diet. You are so\u00a0abstentious<\/strong>!<\/em><\/p>\n

You will more commonly hear\u00a0abstain<\/em>, the verb form of this word. Abstain means to avoid or restrain yourself from something, like alcohol, online-shopping, food, etc.<\/p>\n

Essential word parts: <\/strong>Suffix: -ious<\/strong> (used to form an adjective).<\/p>\n

Uncopyrightable<\/h3>\n

Letters:<\/strong> 15<\/p>\n

Definition (adjective):<\/strong> Not able to copyright a piece of artwork. If something is uncopyrightable, one person cannot prevent others from copying or distributing the art.<\/p>\n

The idea was not original, so it was unfortunately uncopyrightable<\/strong>.<\/em><\/p>\n

Un- and -able are common word parts. Try to memorize these and look for them in other English words.<\/p>\n

Essential word parts: <\/strong>Prefix: un-<\/strong> (not) and a suffix: -able<\/strong> (ability).<\/p>\n

Hippopotomonstrosesquipedaliophobia<\/h3>\n

Letters:<\/strong> 35<\/p>\n

Definition (noun):<\/strong> Fear of long words<\/p>\n

As she read this article, she realized that she had a severe case of hippopotomonstrosesquipedaliophobia<\/strong>.<\/em><\/p>\n

This may be how you are feeling right now.<\/p>\n

Essential word parts: <\/strong>Suffix: -phobia<\/strong> (fear).<\/p>\n

Antidisestablishmentarianism<\/h3>\n

Letters:\u00a0<\/strong>28<\/p>\n

Definition (noun):<\/strong> A political philosophy opposed to the disestablishment of the Church of England.<\/p>\n

The word was used to describe a political movement in England in the 1800s. People supporting this movement were against a plan to separate the church from the state.<\/p>\n

There were many supporters of antidisestablishmentarianism<\/b>\u00a0in Wales.\u00a0<\/em><\/p>\n

Essential word parts: <\/strong>Prefix: a<\/strong>nti-<\/strong> (against) and dis- <\/strong>(opposite of), suffix: -arian<\/strong> (engaged in) and -ism <\/strong>(a belief in).<\/p>\n

Honorificabilitudinitatibus<\/h3>\n

Letters:\u00a0<\/strong>27<\/p>\n

Definition (noun):<\/strong> State of being able to achieve honors.<\/p>\n

Dumbledore was well-known for lots of things, including being honorificabilitudinitatibus<\/strong>.\u00a0<\/em><\/p>\n

This rare Latin word features in William Shakespeare’s play “Love’s Labour’s Lost.”<\/p>\n

Essential word parts:<\/strong> A root word honorificabilitudin <\/strong>(the state of being honorable) and suffix: –itatibus<\/strong> (a state of being).\u00a0<\/p>\n

Pseudopseudohypoparathyroidism<\/h3>\n

Letters: <\/strong>28<\/p>\n

Definition (noun)<\/strong>: A rare inherited endocrine disorder that causes abnormal growth of bones.\u00a0<\/p>\n

She was diagnosed with pseudopseudohypoparathyroidism<\/strong>.\u00a0<\/em><\/p>\n

Essential word parts:<\/strong> Pseudo<\/strong>-(prefix) meaning false, hypo<\/strong>-(prefix) meaning below.\u00a0Parathyroid-<\/strong> (root word) small glands in our body which regulate calcium and -ism<\/strong> (suffix) meaning “a belief in.”<\/p>\n

Longest English Words Without Vowels<\/h2>\n

You need a vowel sound in order to pronounce a word! But while the following words do use vowel sounds, there are no vowels in their spelling.<\/p>\n

This is a made-up word that native English speakers recognize from the classic 1964 “Mary Poppins”\u00a0<\/em>movie<\/a> (although a version of this word was invented even earlier<\/a>).<\/p>\n