יִדְּעֹנִי (yiddĕʿōnî) is a Hebrew noun meaning familiar spirit. It appears 11 times in 6 books of the Hebrew Bible (Strong's H3049).

Also rendered

• spiritist

Same Hebrew root (TWOT 848d)

Root family 848: יָדַע yādaʿ — know. (RSV, ASV similar.)

• יָדַע yada — know
• דַּעַת daʿat — knowledge
• מַדּוּעַ maddûaʿ — wherefore?
• דֵּעָה dēʿâ — knowledge
• מַדָּע maddāʿ — knowledge
• דֵּעַ dēaʿ — knowledge
• מוֹדַע môdaʿ — kinsman
• מֹדַעַת mōdaʿat — kindred

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