безыскуственный

From LSJ

ἔνθα οὐκ ἔστι πόνος, οὐ λύπη, οὐ στεναγμός, ἀλλὰ ζωὴ ἀτελεύτητος → where there is no pain, no sorrow, no sighing, but life everlasting

Source

Russian > Greek

ἀνεπιτήδευτος