Recondite

The word “recondite” is an adjective that means difficult or obscure to understand, requiring deep knowledge or understanding. It refers to something that is not easily accessible or known to most people.

Interesting fact: The word “recondite” comes from the Latin word “reconditus,” which means “hidden” or “concealed.” It was first used in English in the early 17th century to describe knowledge or information that is hidden or difficult to comprehend.