G2030 ἐπόπτης (epóptēs)

KJV renderings: eye-witness
Strong's definition: a looker-on
Derivation: from G1909 (ἐπί) and a presumed derivative of G3700 (ὀπτάνομαι);

From James Strong's public-domain dictionaries (G), JSON edition by OpenScriptures (CC-BY-SA). Every dotted-underline word in the text links here.