The quality of being abstruse; difficulty of apprehension.(noun)
Gnu Collaboartive International Dictionary of English: licensed under The Code Project Open License (CPOL)
Use "abstruseness" in a sentence
"Robust ratings prevail, while the departure of Amanda "middle distance" Burton in 2004 has seen wilful abstruseness replaced by a slicker, Spooks-ier, less overtly guff approach."
"I mean, assuming the "New Yorker Cartoon Law of Biting Satire", which states that the jocularity of a particular pasquinade is directly proportional to the abstruseness of the language in which you couch it, it was hilarious."
"But it is an attempt to approach the supreme abstruseness of what surrounds us."