soothsayer

noun

Etymology: From Middle English sothsaier, zothziggere, by surface analysis, sooth (“truth”) + sayer.

1. One who attempts to predict the future, using magic, intuition or intelligence; a diviner.

   “It is a great pleasure to be with you today and to speak to you concerning the future of medicine. In so doing, I do not wish to pose as a soothsayer or crystal gazer.”

   “The past twenty years have seen their share of soothsayers ready to predict with conviction one extreme or another of the alternative futures I have presented.”

2. A mantis (Mantodea spp.)
3. One who tells the truth; a truthful person.
4. A double dart moth (Graphiphora augur).