συμβούλιο

Etymology: From Ancient Greek συμβούλιον (symboulion), from σύν (syn, 'together') + βουλή (boulē, 'counsel, advice'). The root βουλή refers to the ancient Greek council or senate, particularly the Council of 500 (Βουλή των Πεντακοσίων) in ancient Athens. The prefix συν- emphasizes the collective nature of the decision-making body.