I recently came across a word I wasn’t familiar with. That happens a lot when I’m reading but it was surprising in that, this particular time, I was reading a comic book. That’s not a medium usually thought of as having a difficult lexicon.
The word is “nubilous,” an adjective meaning “cloudy, foggy, misty” or “obscure, vague.” It is derived from the Latin word for cloud, “nubes.”

The panel above is from Dagar the Invincible issue #7, published in April 1974 by Gold Key. Don Glut handled the writing and Jesse Santos did the art. Notice the very “cloudy, foggy, misty” elements!