Abbott-Smith Manual Greek Lexicon
πιστικός (G4101)
2 *† πιστικός , -ή, -όν ( πίστις ), having the gift of persuasion (Plat., Gorg. , 455 A). of persons, faithful , trusty (Plut.); of things, trustworthy , genuine : νάρδος π. , Mk 14:3 , Jo 12:3 .†
G. Abbott-Smith, A Manual Greek Lexicon of the New Testament (1922) — public domain