Not sure I understand your point, but "defenestrate" -> "de-fenestrate" which literally translates (via old French) as "un-window"!
Ed: see first part, and the section https://en.m.wikipedia.org/wiki/Defenestration#Origin_of_the...
It's not from old Latin, but rather from "new Latin".
Meanwhile in Swedish, the French origin "Fönster" is preferred.
Ed: see first part, and the section https://en.m.wikipedia.org/wiki/Defenestration#Origin_of_the...
It's not from old Latin, but rather from "new Latin".