Origin: Germanic Old English suffix
Abstruseness has 3 different meanings across 1 category:
the quality of being unclear or abstruse and hard to understand
wisdom that is recondite and abstruse and profound
"the anthropologist was impressed by the reconditeness of the native proverbs"
The property of being abstruse; abstrusity.
This word comes from combining abstruse with the suffix -ness. It originally meant the quality of being difficult to understand or obscure.