"abstruseness" in the noun sense
1. obscureness, obscurity, abstruseness, reconditeness
the quality of being unclear or abstruse and hard to understand
2. reconditeness, abstruseness, abstrusity, profoundness, profundity
wisdom that is recondite and abstruse and profound
"the anthropologist was impressed by the reconditeness of the native proverbs"
Source: WordNet® (An amazing lexical database of English)
Princeton University "About WordNet®."
WordNet®. Princeton University. 2010.
View WordNet® License