knower

From know + -er.

knower (plural knowers)

1. Agent noun of know: one who knows.
   • 1968, Joseph Campbell, The Hero with a Thousand Faces, 2nd edition, London: Fontana Press, published 1993, page 9:

     The doctor is the modern master of the mythological realm, the knower of all the secret ways and words of potency.

• Kernow, wroken