adj.
Pronunciation: ə b- ' strüs, 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