inscrutable (adj.)
- ambiguous
 - arcane
 - cabalistic
 - impenetrable
 - inarticulate
 - incognizable
 - incoherent
 - incomprehensible
 - mystic
 - numinous
 - rambling
 - unaccountable
 - unconnected
 - unfathomable
 - unintelligible
 - unknowable
 
O jest unseen, inscrutable, invisible,
As a nose on a man's face, or a weathercock on a steeple.