1) a knower, one who has a familiar spirit

1a) a familiar spirit, soothsayer, necromancer (meton)

Root √ידע: יָדַע vb know Qal know learn to know , perceive perceive and see find out and discern ; discriminate distinguish , know by experience recognize admit acknowledge confess . consider not know not expect = know be acquainted with a person, know a person carnally, of sexual intercourse know how , to do a thing, be able to do it be skilful in have knowledge be wise abs. Niph be made known be become known ,or, of things make oneself known of pers. be perceived be instructed . Pi cause to know . Pu known . Hiph make known declare . Hoph made known . Hithp make oneself known . 943.

יִדְּעֹנִי n.m familiar spirit knowing wise intimate acquaintance .(prop. either as,(acquianted with secrets of unseen world); or asof soothsayer)