Where
defenestration is the act of throwing something
out of a window, transfenestration is the act of throwing something
through a window. Difference being the necessary breakage of glass. From
trans - through plus
fenestra - window,
French or possibly
Latin.
Also,
00100 has informed me that
fenster also means window in
German, so the root of the
Romance words may be
Germanic.
Thomas Pynchon may have coined this word. Zoyd Wheeler, the protagonist of Vineland, publicly transfenestrates himself once a year to prove his insanity so he can continue to receive disability checks from the government.