abstruse
adj.adj. difficult to understand because the subject is very deep or complicated. You use this for ideas or writing that require a lot of effort to figure out.
adj. difficult to understand; obscure. Adjective, typically used of intellectual or academic subjects that are unnecessarily complex or recondite.
The professor's lecture is too abstruse for me.
Few students managed to follow the abstruse philosophical arguments presented in the final chapter of the textbook.
The philosopher’s writing is often criticized for being intentionally abstruse, hiding simple concepts behind layers of technical jargon that serves only to alienate the general public.
PIE word *h₂epó Learned borrowing from Latin abstrūsus (“concealed, hidden; having been concealed”), an adjective use of the perfect passive participle of abstrūdō (“to conceal, hide; to push or thrust away”), from abs- (from ab- (prefix meaning ‘away; from; away from’)) + trūdō (“to push, shove; to thrust”) (ultimately from Proto-Indo-European *trewd- (“to push; to thrust”)). Cognates * Catalan abstrús * German abstrus (“abstruse”) * Italian astruso (“abstruse”) * Middle French abstruse (modern French abstrus, abstruse (“(derogatory, literary) abstruse”) * Portuguese abstruso (“abstruse”) * Spanish abstruso (“abstruse”)