One of my favourites:
dis·com·bob·u·late
Pronunciation: "dis-k&m-'bä-b(y)&-"lAt
Function: transitive verb
Inflected Form(s): -lat·ed; -lat·ing
Etymology: probably alteration of discompose
Date: circa 1916
: UPSET, CONFUSE <the offensive had discombobulated all the German defensive arrangements...