Adjective

• 1. resembling or characteristic of a prophet or prophecy;

  "the high priest's divinatory pronouncement"

  "mantic powers"

  "a kind of sibylline book with ready and infallible answers to questions"

• 2. based primarily on surmise rather than adequate evidence;

  "theories about the extinction of dinosaurs are still highly conjectural"

  "the supposed reason for his absence"

  "suppositious reconstructions of dead languages"

  "supposititious hypotheses"