inscrutable
1. [ adjective ] of an obscure nature
Synonyms: mysterious cryptic mystifying deep cryptical
Examples:

"the new insurance policy is written without cryptic or mysterious terms" "a deep dark secret" "the inscrutable workings of Providence" "rituals totally mystifying to visitors from other lands"

Related terms: inexplicable
Similar spelling:   incurable
  incorruptible
  incurableness
  inscrutability
  incurably
  incurability
  incorrupt
  inaccurate
  incorruptness
  incorrigible
  incorruption
  inaccurately
  incredible
  incertitude
  incertain
  in_circles
  in_chorus