abstruse

It’s not exactly secret, but it’s abstruse enough that they hope most people, who aren’t fully conversant with the complexities of the program, won’t get the drift.

I wasn’t expecting to write such a sentence about an abstract and some might even say abstruse Sondheim musical that has had only one short-lived Broadway revival.

A figure of undisputed authority in some of the most abstruse corners of computing, Conway was elected to the National Academy of Engineering in 1989.

The members kept peppering Daszak with questions about abstruse matters of science and the grant-making process, only to rudely cut him off when he tried to respond.

Higgs, who shared the 2013 Nobel Prize in Physics and spent almost his entire career at the University of Edinburgh, could be as retiring as his work was abstruse.