Dictionary
in•scru•ta•ble
Pronunciation: (in-skrOO'tu-bul), [key]—
adj.
1. incapable of being investigated, analyzed, or scrutinized; impenetrable.
2. not easily understood; mysterious; unfathomable:
an inscrutable smile.
3. incapable of being seen through physically; physically impenetrable:
the inscrutable depths of the ocean. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease.