G1128 γυμνάζω (gymnázō)

KJV renderings: exercise
Strong's definition: to practise naked (in the games), i.e. train (figuratively)
Derivation: from G1131 (γυμνός);

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