inscrutable

(noun, adjective)

adjective

1. of an obscure nature

- the inscrutable workings of Providence

Similar word(s): incomprehensible, inexplicable, cryptic, cryptical, deep, mysterious, mystifying

Sentences with inscrutable as an adjective:

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

noun

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