Abbott-Smith Manual Greek Lexicon
σύμβουλος (G4825)
1 σύμβουλος , -ου, ὁ ( σύν , βουλή ), [in LXX for יוֺעֵץ and cogn. forms ;] a counsellor, adviser : Ro 11:34 (LXX) .†
G. Abbott-Smith, A Manual Greek Lexicon of the New Testament (1922) — public domain