What Is The Longest Word With The Most Syllables?

What Is The Longest Word With The Most Syllables? According to Syllable Count, the English word with the most syllables is pneumonoultramicroscopicsilicovolcanoconiosis, with 19 syllables. It is defined as pneumoconiosis, caused by inhalation of very fine silicate or quartz dust. What is the longest 2 syllable word? [EDD] The associated 17-letter SQUAITCHED-MOUTHED (lying, deceitful) is