A sesquipedalianist Boggle puzzle

During my analysis of the effects of playing Boggle with different letter distributions, I simulated more than 50,000 games of standard 4-by-4 Boggle. One statistic that I was tracking was the longest word found across each of the data sets. Invariably, each data set got stuck at a maximum word length of 11 letters. (In the Big Boggle simulations, the solver found words as long as 13 letters.) I was really hoping for something longer, but rather than keep running simulations until I finally find some 12-letter word and have it turn out to be something disappointing, like BORINGNESSES, I've decided to embed one 16-letter word in a Boggle grid and present it below as a puzzle for your solving pleasure.

Good luck!