abstruse

Definitions

Difficult to understand; obscure.

Recondite or esoteric in nature.

Examples

The professor's lecture on quantum mechanics was so abstruse that most of the students struggled to follow his logic.

He spent years trying to decipher the abstruse symbols carved into the ancient stone tablet.

Synonyms

esoteric obscure arcane recondite enigmatic cryptic incomprehensible

Antonyms

clear obvious simple plain intelligible manifest transparent