Longest Word Game

[Fadi]

Hi guys how r u doin?
I have a game and I hope u all participate..............
what's the longest common English word that u ever heard or read?
simple game with only one condition
the condition is to write the meaning of the word in Arabic or to define the word in English, and please don't write meaningless words

[Deacon Leenos]

hi fadi >> is it antidisestablishmentarianism

[Fadi]

thanx Leenos
this has 28 letters
but here's another one with 29 letters
floccinaucinihilipilification
and it means
the act of estimating as worthless
and I even have longer words but this one is the longest one mentioned in Oxford dictionaries