inscrutable

Not only can this create a feeling of helplessness, it also lends drones an inscrutability that can feel threatening.
Why Drones Make Us Nervous|Josh Dzieza|May 17, 2013|DAILY BEAST
She prepares for her whirlwind, worldwide fashion week tour with inscrutability and perfectionism.
Fashion's Other Anna|Paul Flynn|September 26, 2010|DAILY BEAST
Always they met your gaze with a baffling veil of inscrutability.
Lonesome Land|B. M. Bower
Moreover, she was slightly staggered by the strength and inscrutability of his countenance, the repose of his bearing and manner.
The History of Sir Richard Calmady|Lucas Malet

Anyhow, an attempt at inscrutability is the typical refuge for the ignorant and the smaller the road the more futile the attempt.
The Yazoo Mystery|Irving Craddock
That wonderful smiling mask—the inscrutability of Youth—was laid aside by her at night.
The Patrician|John Galsworthy
He came across to her; he stood looking at her with his strange new expression of inscrutability.
Max|Katherine Cecil Thurston

British Dictionary definitions for inscrutability

inscrutable

/ (ɪnˈskruːtəbəl) /

adjective

incomprehensible; mysterious or enigmatic

Derived forms of inscrutable

inscrutability or inscrutableness, nouninscrutably, adverb

Word Origin for inscrutable

C15: from Late Latin inscrūtābilis, from Latin in- 1 + scrūtārī to examine

Collins English Dictionary - Complete & Unabridged 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012