ABSTRUSENESS
obscureness, obscurity, abstruseness, reconditeness
(noun) the quality of being unclear or abstruse and hard to understand
reconditeness, abstruseness, abstrusity, profoundness, profundity
(noun) wisdom that is recondite and abstruse and profound; “the anthropologist was impressed by the reconditeness of the native proverbs”
Source: WordNet® 3.1
Etymology
Noun
abstruseness (countable and uncountable, plural abstrusenesses)
The property of being abstruse; abstrusity. [First attested in the mid 17th century.]
Source: Wiktionary
Ab*struse"ness, n.
Definition: The quality of being abstruse; difficulty of apprehension.
Boyle.
Source: Webster’s Unabridged Dictionary 1913 Edition