The longest phrase within the English language is pneumonoultramicroscopicsilicovolcanoconiosis, a lung illness brought about through the inhalation of very high-quality silica mud, typically present in volcanoes.
The phrase was once first coined through American doctor and writer Everett M. Smith in 1935. He created the phrase from the Greek roots pneumono (lung), extremely (very), microscopic (small), silico (silicon), volcano (volcano), and -osis (situation). The phrase is 45 letters lengthy and is pronounced as noo-moh-no-ul-tra-mih-kroh-skoh-pih-ko-sih-lih-koh-voh-lka-noh-koh-nee-oh-sis.
