An abstrudere descendant that has survived is abstruse, an adjective that recalls the meaning of its Latin parent abstrūsus, meaning "concealed."

His work was abstruse and impenetrable, his demeanor reserved, and his resistance to using the bully pulpit to comment on current economic events unprecedented.

It is useful when describing something that is overly confusing, or if someone is deliberately making a story or a situation more complicated than necessary. It sounds and looks like …

Synonyms for ABSTRUSE: esoteric, profound, recondite, ambiguous, arcane, hermetic, scholarly, confusing; Antonyms of ABSTRUSE: superficial, shallow, simple, easy, straightforward, …

At times the harmonies or modes feel so murky or abstruse as to demand your full attention; the next moment they may snap into place with a heavy, head-nodding vamp. From NPR …

Abstruse derives from the past participle of abstrūdere, a verb meaning “to conceal.” Obtuse derives from the past participle of obtundere, meaning “to beat against” or “to blunt.” Abstruse …

You can describe something as abstruse if you find it difficult to understand, especially when you think it could be explained more simply.