Extended Strong's Greek Lexicon (Abbott-Smith based)
guardian
Usage: παιδαγωγός, -oῦ, ὁ (παῖς, ἄγω), a guide, guardian, trainer of boys, a tutor (disting. from διδάσκαλος, Xen., Lac., 3, 1), usually a trusty slave: opposite to πατήρ, 1Co.4:15; figuratively, of the Law, π. εἰς Χριστόν, Gal.3:24-25.† (AS)