What is the longest word in English? pls help me !?

the art of judging somethin worthless

at 29 letters is the longest non technical word in the O.E.D.

however many medical terms are longer

pseudopseudohypoparathyroidism

30 letters

‘Pneumonoultramicroscopicsilicovolcanoconiosis’

45 letters

according to the O.E.D the longest word with one syllable is a ten letter one

scraunched

an obsolete form of scrunched

the word

strengths

is the longest one vowel one syllable word

Llanfairpwllgwyngyllgogerychwyrndrobwllllantysiliogogogoch

is the UK’s longest one word place name

translates from the welsh as

saint mary’s chuch in the hollow of the white hazel, near a rapid whirlpool and the church of st tysilio of the red cave

Taumatawhakatangihangakoauauotamateaturipukakapikimaungahoronukupokaiwhenuakitanatahu

is arguably the worlds longest one word place name [arguably because it is often split or hyphened]

translates as the ‘place where Tamatea, the man with the big knees, who slid, climbed and swallowed mountains, known as land-eater, played his flute to his loved one’.

supercalifragilisticexpialidocious

the 34-letter title of a song from the movie Mary Poppins, does appear in several dictionaries, but only as a proper noun defined in reference to the song title. The attributed meaning is “a word that you say when you don’t know what to say.”

the pepsi ad

“Lip­smackin­thirst­quenchin­acetastin­motivatin­good­buzzin­cool­talkin­high­walkin­fast­livin­ever­givin­cool­fizzin”

at 100 letters is the longest one ‘word’ advertising message

ANTIDISESTABLISHMENTARIANISM

28 letters

I think its like a political party or a belief that some society’s based on.