Word of the day: Abstruse

Abstruse:  de sentido obscuro, confuso, difícil de compreender, recôndito

Synonyms: hermetic,  profound, arcane, deep, esoteric, recondite

“Her subject matter is abstruse.”

“You're not the only one who finds Einstein's theory of relativity abstruse.”(www.merriam-webster.com)