The word defenestration was invented from Latin roots specifically to describe one 1618 incident, the Defenestration of Prague, in which several officials were tossed unceremoniously out of a window by some angry Protestants, and to refer to future such window-removals. The root here is the Latin word fenestra, meaning "window". This has a curiously obscure etymology. Some linguists think it may derive from Etruscan (which would make it non-Indo-European) and others proffer a connection with the Greek verb phainein, which means "to show" (this would be from the Proto-Indo-European root beh, meaning "to shine"). Apart from this main part, we have the prefix de-, meaning "out" (and this definitely is from an unknown Etruscan word), and the suffix -ion, which just implies an action. So, if we go as far back as possible, defenestration can be taken to mean "to show out". Interesting.
Adam Aleksic has been described as the internet's sixth most famous etymologist. He loves writing about himself in the third person, he's a freshman at Harvard University, and he has disturbing interests in linguistics, vexillology, geography, board games, limericks, and law.
The Etymology Nerd