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The longest English word in a major dictionary is 45 letters long, but the longest English word ever is the chemical name of the largest known protein, titin. en.wiktionary.org/wiki/Appendix:…
For anyone who’s wondering, the full word is ylalanylglutaminylglutamylarginylisoleucylglutamylprolylprolylglutamylisoleucylglutamylleucylaspartylalanylaspartylleucylarginyllysylvalylvalylvalylleucylarginylalanylserylalanylthreonylleucylarginylleucylphenylalanylvalylthreonylisole
ucyllysylglycylarginylprolylglutamylprolylglutamylvalyllysyltryptophylglutamyllysylalanylglutamylglycylisoleucylleucylthreonylaspartylarginylalanylglutaminylisoleucylglutamylvalylthreonylserylserylphenylalanylthreonylmethionylleucylvalylisoleucylaspartylasparaginylvalylthreonylar
ginylphenylalanylaspartylserylglycylarginyltyrosylasparaginylleucylthreonylleucylglutamylasparaginylasparaginylserylglycylseryllysylthreonylalanylphenylalanylvalylasparaginylvalylarginylvalylleucylaspartylserylprolylserylalanylprolylvalylasparaginylleucylthreonylisoleucylarginylg
lutamylvalyllysyllysylaspartylserylvalylthreonylleucylseryltryptophylglutamylprolylprolylleucylisoleucylaspartylglycylglycylalanyllysylisoleucylthreonylasparaginyltyrosylisoleucylvalylglutamyllysylarginylglutamylthreonylthreonylarginyllysylalanyltyrosylalanylthreonylisoleucylthre
(this is going to take a while)
onylasparaginylasparaginylcysteinylthreonyllysylthreonylthreonylphenylalanylarginylisoleucylglutamylasparaginylleucylglutaminylglutamylglycylcysteinylseryltyrosyltyrosylphenylalanylarginylvalylleucylalanylserylasparaginylglutamyltyrosylglycylisoleucylglycylleucylprolylalanylgluta
mylthreonylthreonylglutamylprolylvalyllysylvalylserylglutamylprolylprolylleucylprolylprolylglycylarginylvalylthreonylleucylvalylaspartylvalylthreonylarginylasparaginylthreonylalanylthreonylisoleucyllysyltryptophylglutamyllysylprolylglutamylserylaspartylglycylglycylseryllysylisole
ucylthreonylglycyltyrosylvalylvalylglutamylmethionylglutaminylthreonyllysylglycylserylglutamyllysyltryptophylserylthreonylcysteinylthreonylglutaminylvalyllysylthreonylleucylglutamylalanylthreonylisoleucylserylglycylleucylthreonylalanylglycylglutamylglutamyltyrosylvalylphenylalany
larginylvalylalanylalanylvalylasparaginylglutamyllysylglycylarginylserylaspartylprolylarginylglutaminylleucylglycylvalylprolylvalylisoleucylalanylarginylaspartylisoleucylglutamylisoleucyllysylprolylserylvalylglutamylleucylprolylphenylalanylhistidylthreonylphenylalanylasparaginylv
alyllysylalanylarginylglutamylglutaminylleucyllysylisoleucylaspartylvalylprolylphenylalanyllysylglycylarginylprolylglutaminylalanylthreonylvalylasparaginyltryptophylarginyllysylaspartylglycylglutaminylthreonylleucyllysylglutamylthreonylthreonylarginylvalylasparaginylvalylserylser
ylseryllysylthreonylvalylthreonylserylleucylserylisoleucyllysylglutamylalanylseryllysylglutamylaspartylvalylglycylthreonyltyrosylglutamylleucylcysteinylvalylserylasparaginylserylalanylglycylserylisoleucylthreonylvalylprolylisoleucylthreonylisoleucylisoleucylvalylleucylaspartylarg
(Only 187,063 more letters to go!)
inylprolylglycylprolylprolylglycylprolylisoleucylarginylisoleucylaspartylglutamylvalylserylcysteinylaspartylserylisoleucylthreonylisoleucylseryltryptophylasparaginylprolylprolylglutamyltyrosylaspartylglycylglycylcysteinylglutaminylisoleucylserylasparaginyltyrosylisoleucylvalylglu
tamyllysyllysylglutamylthreonylthreonylserylthreonylthreonyltryptophylhistidylisoleucylvalylserylglutaminylalanylvalylalanylarginylthreonylserylisoleucyllysylisoleucylvalylarginylleucylthreonylthreonylglycylserylglutamyltyrosylglutaminylphenylalanylarginylvalylcysteinylalanylglut
amylasparaginylarginyltyrosylglycyllysylserylseryltyrosylserylglutamylserylserylalanylvalylvalylalanylglutamyltyrosylprolylphenylalanylserylprolylprolylglycylprolylprolylglycylthreonylprolyllysylvalylvalylhistidylalanylthreonyllysylserylthreonylmethionylleucylvalylthreonyltryptop
hylglutaminylvalylprolylvalylasparaginylaspartylglycylglycylserylarginylvalylisoleucylglycyltyrosylhistidylleucylglutamyltyrosyllysylglutamylarginylserylserylisoleucylleucyltryptophylseryllysylalanylasparaginyllysylisoleucylleucylisoleucylalanylaspartylthreonylglutaminylvalyllysy
lvalylserylglycylleucylaspartylglutamylglycylleucylmethionyltyrosylglutamyltyrosylarginylvalyltyrosylalanylglutamylasparaginylisoleucylalanylglycylisoleucylglycyllysylcysteinylseryllysylserylcysteinylglutamylprolylvalylprolylalanylarginylaspartylprolylcysteinylaspartylprolylproly
lglycylglutaminylprolylglutamylvalylthreonylasparaginylisoleucylthreonylarginyllysylserylvalylserylleucyllysyltryptophylseryllysylprolylhistidyltyrosylaspartylglycylglycylalanyllysylisoleucylthreonylglycyltyrosylisoleucylvalylglutamylarginylarginylglutamylleucylprolylaspartylglyc
ylarginyltryptophylleucyllysylcysteinylasparaginyltyrosylthreonylasparaginylisoleucylglutaminylglutamylthreonyltyrosylphenylalanylglutamylvalylthreonylglutamylleucylthreonylglutamylaspartylglutaminylarginyltyrosylglutamylphenylalanylarginylvalylphenylalanylalanylarginylasparaginy
lalanylalanylaspartylserylvalylserylglutamylprolylserylglutamylserylthreonylglycylprolylisoleucylisoleucylvalyllysylaspartylaspartylvalylglutamylprolylprolylarginylvalylmethionylmethionylaspartylvalyllysylphenylalanylarginylaspartylvalylisoleucylvalylvalyllysylalanylglycylglutamy
(Almost there! Sort of.)
lvalylleucyllysylisoleucylasparaginylalanylaspartylisoleucylalanylglycylarginylprolylleucylprolylvalylisoleucylseryltryptophylalanyllysylaspartylglycylisoleucylglutamylisoleucylglutamylglutamylarginylalanylarginylthreonylglutamylisoleucylisoleucylserylthreonylaspartylasparaginylh
istidylthreonylleucylleucylthreonylvalyllysylaspartylcysteinylisoleucylarginylarginylaspartylthreonylglycylglutaminyltyrosylvalylleucylthreonylleucyllysylasparaginylvalylalanylglycylthreonylarginylserylvalylalanylvalylasparaginylcysteinyllysylvalylleucylaspartyllysylprolylglycylp
rolylalanylglycylprolylleucylglutamylisoleucylasparaginylglycylleucylthreonylalanylglutamyllysylcysteinylserylleucylseryltryptophylglycylarginylprolylglutaminylglutamylaspartylglycylglycylalanylaspartylisoleucylaspartyltyrosyltyrosylhistidylarginyllysyllysylarginylglutamylthreony
lserylhistidylleucylalanyltryptophylthreonylisoleucylcysteinylglutamylglycylglutamylleucylglutaminylmethionylthreonylserylcysteinyllysylvalylthreonyllysylleucylleucyllysylglycylasparaginylglutamyltyrosylisoleucylphenylalanylarginylvalylthreonylglycylvalylasparaginyllysyltyrosylgl
ycylglutamylprolylleucylglutamylserylvalylalanylisoleucyllysylalanylleucylaspartylprolylphenylalanylthreonylvalylprolylserylprolylprolylthreonylserylleucylglutamylisoleucylthreonylserylvalylthreonyllysylglutamylserylmethionylthreonylleucylcysteinyltryptophylserylarginylprolylglut
amylserylaspartylglycylglycylserylglutamylisoleucylserylglycyltyrosylisoleucylisoleucylglutamylarginylarginylglutamyllysylasparaginylserylleucylarginyltryptophylvalylarginylvalylasparaginyllysyllysylprolylvalyltyrosylaspartylleucylarginylvalyllysylserylthreonylglycylleucylarginyl
glutamylglycylcysteinylglutamyltyrosylglutamyltyrosylarginylvalyltyrosylalanylglutamylasparaginylalanylalanylglycylleucylserylleucylprolylserylglutamylthreonylserylprolylleucylisoleucylarginylalanylglutamylaspartylprolylvalylphenylalanylleucylprolylserylprolylprolylseryllysylprol
yllysylisoleucylvalylaspartylserylglycyllysylthreonylthreonylisoleucylthreonylisoleucylalanyltryptophylvalyllysylprolylleucylphenylalanylaspartylglycylglycylalanylprolylisoleucylthreonylglycyltyrosylthreonylvalylglutamyltyrosyllysyllysylserylaspartylaspartylthreonylaspartyltrypto
phyllysylthreonylserylisoleucylglutaminylserylleucylarginylglycylthreonylglutamyltyrosylthreonylisoleucylserylglycylleucylthreonylthreonylglycylalanylglutamyltyrosylvalylphenylalanylarginylvalyllysylserylvalylasparaginyllysylvalylglycylalanylserylaspartylprolylserylaspartylseryls
erylaspartylprolylglutaminylisoleucylalanyllysylglutamylarginylglutamylglutamylglutamylprolylleucylphenylalanylaspartylisoleucylaspartylserylglutamylmethionylarginyllysylthreonylleucylisoleucylvalyllysylalanylglycylalanylserylphenylalanylthreonylmethionylthreonylvalylprolylphenyl
alanylarginylglycylarginylprolylvalylprolylasparaginylvalylleucyltryptophylseryllysylprolylaspartylthreonylaspartylleucylarginylthreonylarginylalanyltyrosylvalylaspartylthreonylthreonylaspartylserylarginylthreonylserylleucylthreonylisoleucylglutamylasparaginylalanylasparaginylarg
inylasparaginylaspartylserylglycyllysyltyrosylthreonylleucylthreonylisoleucylglutaminylasparaginylvalylleucylserylalanylalanylserylleucylthreonylleucylvalylvalyllysylvalylleucylaspartylthreonylprolylglycylprolylprolylthreonylasparaginylisoleucylthreonylvalylglutaminylaspartylvaly
lthreonyllysylglutamylserylalanylvalylleucylseryltryptophylaspartylvalylprolylglutamylasparaginylaspartylglycylglycylalanylprolylvalyllysylasparaginyltyrosylhistidylisoleucylglutamyllysylarginylglutamylalanylseryllysyllysylalanyltryptophylvalylserylvalylthreonylasparaginylasparag
inylasparaginylcysteinylasparaginylarginylleucylseryltyrosyllysylvalylthreonylasparaginylleucylglutaminylglutamylglycylalanylisoleucyltyrosyltyrosylphenylalanylarginylvalylserylglycylglutamylasparaginylglutamylphenylalanylglycylvalylglycylisoleucylprolylalanylglutamylthreonyllysy
Only 49,785 characters left until we're finished spelling the longest word! Should we keep going?
(why yes, we did leave out the "please stop" option)
WE'RE GOING FOR IT
lglutamyllysylprolylserylprolylprolylglutamyllysylleucylglycylvalylthreonylserylisoleucylseryllysylaspartylserylvalylserylleucylthreonyltryptophylleucyllysylprolylglutamylhistidylaspartylglycylglycylserylarginylisoleucylvalylhistidyltyrosylvalylvalylglutamylalanylleucylglutamylly
sylglycylglutaminyllysylasparaginyltryptophylvalyllysylcysteinylalanylvalylalanyllysylserylthreonylhistidylhistidylvalylvalylserylglycylleucylarginylglutamylasparaginylserylglutamyltyrosylphenylalanylphenylalanylarginylvalylphenylalanylalanylglutamylasparaginylglutaminylalanylgl
ycylleucylserylaspartylprolylarginylglutamylleucylleucylleucylprolylvalylleucylisoleucyllysylglutamylglutaminylleucylglutamylprolylprolylglutamylisoleucylaspartylmethionyllysylasparaginylphenylalanylprolylserylhistidylthreonylvalyltyrosylvalylarginylalanylglycylserylasparaginyll
eucyllysylvalylaspartylisoleucylprolylisoleucylserylglycyllysylprolylleucylprolyllysylvalylthreonylleucylserylarginylaspartylglycylvalylprolylleucyllysylalanylthreonylmethionylarginylphenylalanylasparaginylthreonylglutamylisoleucylthreonylalanylglutamylasparaginylleucylthreonyli
soleucylasparaginylleucyllysylglutamylserylvalylthreonylalanylaspartylalanylglycylarginyltyrosylglutamylisoleucylthreonylalanylalanylasparaginylserylserylglycylthreonylthreonyllysylalanylphenylalanylisoleucylasparaginylisoleucylvalylvalylleucylaspartylarginylprolylglycylprolylpro
(What, you thought I forgot?)
lylthreonylglycylprolylvalylvalylisoleucylserylaspartylisoleucylthreonylglutamylglutamylserylvalylthreonylleucyllysyltryptophylglutamylprolylprolyllysyltyrosylaspartylglycylglycylserylglutaminylvalylthreonylasparaginyltyrosylisoleucylleucylleucyllysylarginylglutamylthreonylseryl
threonylalanylvalyltryptophylthreonylglutamylvalylserylalanylthreonylvalylalanylarginylthreonylmethionylmethionyllysylvalylmethionyllysylleucylthreonylthreonylglycylglutamylglutamyltyrosylglutaminylphenylalanylarginylisoleucyllysylalanylglutamylasparaginylarginylphenylalanylglyc
ylisoleucylserylaspartylhistidylisoleucylaspartylserylalanylcysteinylvalylthreonylvalyllysylleucylprolyltyrosylthreonylthreonylprolylglycylprolylprolylserylthreonylprolyltryptophylvalylthreonylasparaginylvalylthreonylarginylglutamylserylisoleucylthreonylvalylglycyltryptophylhist
idylglutamylprolylvalylserylasparaginylglycylglycylserylalanylvalylvalylglycyltyrosylhistidylleucylglutamylmethionyllysylaspartylarginylasparaginylserylisoleucylleucyltryptophylglutaminyllysylalanylasparaginyllysylleucylvalylisoleucylarginylthreonylthreonylhistidylphenylalanylly
sylvalylthreonylthreonylisoleucylserylalanylglycylleucylisoleucyltyrosylglutamylphenylalanylarginylvalyltyrosylalanylglutamylasparaginylalanylalanylglycylvalylglycyllysylprolylserylhistidylprolylserylglutamylprolylvalylleucylalanylisoleucylaspartylalanylcysteinylglutamylprolylpr
olylarginylasparaginylvalylarginylisoleucylthreonylaspartylisoleucylseryllysylasparaginylserylvalylserylleucylseryltryptophylglutaminylglutaminylprolylalanylphenylalanylaspartylglycylglycylseryllysylisoleucylthreonylglycyltyrosylisoleucylvalylglutamylarginylarginylaspartylleucyl
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Okay okay, I can hear your rising screams of protest through the screen. Should I continue with the longest word?
prolylaspartylglycylarginyltryptophylthreonyllysylalanylserylphenylalanylthreonylasparaginylvalylthreonylglutamylthreonylglutaminylphenylalanylthreonylisoleucylserylglycylleucylthreonylglutaminylasparaginylserylglutaminyltyrosylglutamylphenylalanylarginylvalylphenylalanylalanyla
rginylasparaginylalanylvalylglycylserylisoleucylserylasparaginylprolylserylglutamylvalylvalylglycylprolylisoleucylthreonylcysteinylisoleucylaspartylseryltyrosylglycylglycylprolylvalylisoleucylaspartylleucylprolylleucylglutamyltyrosylthreonylglutamylvalylvalyllysyltyrosylarginyla
lanylglycylthreonylserylvalyllysylleucylarginylalanylglycylisoleucylserylglycyllysylprolylalanylprolylthreonylisoleucylglutamyltryptophyltyrosyllysylaspartylaspartyllysylglutamylleucylglutaminylthreonylasparaginylalanylleucylvalylcysteinylvalylglutamylasparaginylthreonylthreonyl
aspartylleucylalanylserylisoleucylleucylisoleucyllysylaspartylalanylaspartylarginylleucylasparaginylserylglycylcysteinyltyrosylglutamylleucyllysylleucylarginylasparaginylalanylmethionylalanylserylalanylserylalanylthreonylisoleucylarginylvalylglutaminylisoleucylleucylaspartyllysy
lprolylglycylprolylprolylglycylglycylprolylisoleucylglutamylphenylalanyllysylthreonylvalylthreonylalanylglutamyllysylisoleucylthreonylleucylleucyltryptophylarginylprolylprolylalanylaspartylaspartylglycylglycylalanyllysylisoleucylthreonylhistidyltyrosylisoleucylvalylglutamyllysyl
arginylglutamylthreonylserylarginylvalylvalyltryptophylserylmethionylvalylserylglutamylhistidylleucylglutamylglutamylcysteinylisoleucylisoleucylthreonylthreonylthreonyllysylisoleucylisoleucyllysylglycylasparaginylglutamyltyrosylisoleucylphenylalanylarginylvalylarginylalanylvalyl
asparaginyllysyltyrosylglycylisoleucylglycylglutamylprolylleucylglutamylserylaspartylserylvalylvalylalanyllysylasparaginylalanylphenylalanylvalylthreonylprolylglycylprolylprolylglycylisoleucylprolylglutamylvalylthreonyllysylisoleucylthreonyllysylasparaginylserylmethionylthreonyl
(Almost done! Really, I swear!)
valylvalyltryptophylserylarginylprolylisoleucylalanylaspartylglycylglycylserylaspartylisoleucylserylglycyltyrosylphenylalanylleucylglutamyllysylarginylaspartyllysyllysylserylleucylglycyltryptophylphenylalanyllysylvalylleucyllysylglutamylthreonylisoleucylarginylaspartylthreonylar
ginylglutaminyllysylvalylthreonylglycylleucylthreonylglutamylasparaginylserylaspartyltyrosylglutaminyltyrosylarginylvalylcysteinylalanylvalylasparaginylalanylalanylglycylglutaminylglycylprolylphenylalanylserylglutamylprolylserylglutamylphenylalanyltyrosyllysylalanylalanylasparty
partylprolylisoleucylaspartylprolylprolylglycylprolylprolylalanyllysylisoleucylarginylisoleucylalanylaspartylserylthreonyllysylserylserylisoleucylthreonylleucylglycyltryptophylseryllysylprolylvalyltyrosylaspartylglycylglycylserylalanylvalylthreonylglycyltyrosylvalylvalylglutamyl
