from The American Heritage® Dictionary of the English Language, 4th Edition
- adj. Difficult to fathom or understand; impenetrable. See Synonyms at mysterious.
from Wiktionary, Creative Commons Attribution/Share-Alike License
- adj. Difficult or impossible to comprehend, fathom, or interpret.
- n. One who or that which is inscrutable; a person, etc. that cannot be comprehended.
from the GNU version of the Collaborative International Dictionary of English
- adj. Unsearchable; incapable of being searched into and understood by inquiry or study; impossible or difficult to be explained or accounted for satisfactorily; obscure; incomprehensible.
from The Century Dictionary and Cyclopedia
- Incapable of being searched into or scrutinized; impenetrable to inquiry or investigation; incognizable: as, the ways of Providence are often inscrutable.
- Synonyms Impenetrable, undiscoverable, incomprehensible, unsearchable, mysterious.
from WordNet 3.0 Copyright 2006 by Princeton University. All rights reserved.
- adj. of an obscure nature
Middle English, from Old French, from Late Latin īnscrūtābilis : in-, not; see in-1 + scrūtārī, to scrutinize; see scrutiny.(American Heritage® Dictionary of the English Language, Fourth Edition)
From the Latin inscrutabilis, from in- ("not") + scrutare ("to examine"), corresponding to in- + scrutable (Wiktionary)