What is the Greek word for advice?

The most common Greek word for advice is σύμβουλος (sýmboulos), which literally translates to "counselor" or "advisor." While it refers to the person giving advice, it's often used to refer to the advice itself in context.

Other words could be used depending on the nuance:

* βουλή (boulé): Means "council," "will," or "plan," and can imply advice given by a group.

* γνώμη (gnómi): Means "opinion" or "judgment," and could be used for advice given as a personal opinion.

But σύμβουλος (sýmboulos) is the most straightforward and generally applicable translation for "advice."