From Longman Dictionary of Contemporary Englishabstruseab‧struse /əbˈstruːs, æb-/ adjective formal COMPLICATEDunnecessarily complicated and difficult to understand Maths is a mix of abstruse theory and detailed calculations.Origin abstruse (1500-1600) Latin past participle of abstrudere “to hide”, from abs- “away” + trudere “to push”
