The Collaborative International Dictionary
Mysteriousness
Mysteriousness \Mys*te"ri*ous*ness\, n.
The state or quality of being mysterious.
Something mysterious; a mystery. [R.]
--Jer. Taylor.
Wiktionary
mysteriousness
n. The quality of being mysterious.
Usage examples of "mysteriousness".
The emptiness, the quiet, the green subaqueous light, gave it a dignity and a mysteriousness that did not belong to its daytime personality.
When it comes to A 1 right-down solid mysteriousness, he lays over both of them.