inscrutable

Meanings

1. 1
   adj

   Difficult or impossible to comprehend, fathom, or interpret.

   His inscrutable theories would years later become the foundation of a whole new science.

2. 2
   adj

   of an obscure nature

3. 3
   noun

   One who or that which is inscrutable; a person, etc. that cannot be comprehended.

Etymology

Borrowed into late Middle English from Late Latin īnscrūtābilis, from in- (“not”) + scrūtō (“to examine”), corresponding to in- + scrutable