What is the longest word in the world pronunciation?

Hi, Peter! Great question and good curiosity. The longest word in the world has 189,819 letters and takes over three hours to pronounce fully! It is the chemical name of titin: 'Methionylthreonylthreonylglutaminylarginyl...isoleucine.'

Instead, let me introduce you to another long word: 'Pneumonoultramicroscopicsilicovolcanoconiosis.' This 45-letter word refers to a lung disease caused by inhaling very fine dust particles from things like volcanoes.

Here’s how to pronounce it using simple sounds:
"NOO-muh-noh-uhl-truh-mahy-kruh-skop-ik-SIL-i-koh-vol-key-noh-koh-nee-OH-sis"
The capital letters show which parts of the word to stress when you say it.

Sample Sentence: "Breathing in volcanic ash can cause pneumonoultramicroscopicsilicovolcanoconiosis."

Thank you, and I hope this helps!