Noun
The quality or state of being inscrutable; inscrutableness.
Source: Webster's dictionarythe inscrutability of the future Source: Internet
And not just any classmate, but Rosalind Ryan, whose beauty and inscrutability exerted a magnetic pull on Smithson High School, first during Rosalind’s student years and then again when she returned to teach drama. Source: Internet
The sparseness and patience of My Happy Family are integral to its power, matching the inscrutability of Manana herself. Source: Internet