Main Entry:

ab·struse

Pronunciation:

\əb-ˈstrüs, ab-\

Function:

adjective

Etymology:

Latin abstrusus, from past participle of abstrudere to conceal, from abs-, ab- + trudere to push — more at threat

Date:

1599

: difficult to comprehend : recondite <the abstruse calculations of mathematicians>

— ab·struse·ly adverb

— ab·struse·ness noun