γυμνάζεσθαι

From LSJ

θεὸς δ' ἁμαρτάνουσιν οὐ παρίσταται → God doesn't stand by those who do wrong

Source

Greek > English (Woodhouse Verbs Reversed)

(see also γυμνάζω): exercise oneself

Lexicon Thucydideum

exercere se, to practice, 1.6.5.