What are some examples of unfamiliar words with their meanings and ethymology?

Sesquipedalian: A term used to describe long Words or sentences. It comes from the Latin Word "sesquipedalis," which literally means "a foot and a half long."

Defenestration: The act of throwing someone out of a window. It originated from a series of incidents in Prague known as the Defenestrations of Prague, where people were thrown out of Windows.

Gobbledygook: Language that is meaningless or difficult to understand. It was coined in the 1940s by U.S. Representative Maury Maverick to describe confusing bureaucratic language.