seer

Etymology 1

see + -er (“agent suffix”).

noun

1. One who foretells the future; a clairvoyant, prophet, soothsayer or diviner.
   But I must not forget to tell you that the lad was born on a Sunday, and had found a card with the four of clubs; therefore he was a seer, that is to say, he could see the supernatural people, but they could not see him. 1886, Peter Christen Asbjørnsen, translated by H.L. Brækstad, Folk and Fairy Tales, page 185
2. One who sees something; an eyewitness.
   As a seer of beautiful visions, or, shall we say, of visions of the beautiful, he is never weary of celebrating the poet and his vocation. 1924, Arthur Eustace Morgan, Tendencies of Modern English Drama, page 140

Etymology 2

See sihr.

noun

1. Alternative form of sihr