This is a very, VERY long word!

Book Brief | Nov 2023

We love words. Short ones, long ones, and even unsayable ones.


The longest word in the Oxford English Dictionary, pneumonoultramicroscopicsilicovolcanoconiosis. The word refers to a lung disease and is 45 letters long. Try and say it quickly!

According to the Oxford English Dictionary, the word was first used in the 1930s as a way to poke fun at overly complex scientific phrases. While 45 letters may seem extensive, the longest word in the English language contains 189,819 letters.

The technical term for the protein, titin, doesn’t feature in any dictionaries and takes over three hours to say out loud.




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