Word meanings
Strong's dictionary
from יָדַע; properly, a knowing one; specifically, a conjurer; (by impl) a ghost; wizard.
Strong's Exhaustive Concordance (public domain)
Full lexicon entry (Brown-Driver-Briggs)
יִדְּעֹנִי n.m. familiar spirit (prop. either as knowing, wise (acquianted with secrets of unseen world); or as intimate acquaintance of soothsayer)
Every occurrence
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Deuteronomy 18:11 וְיִדְּעֹנִ֔י ve.yi.de.'o.Ni · A person, place or thing
or a charmer, or a consulter with a familiar spirit, or a wizard, or a necromancer.
American Standard Version (1901). Public domain.