долг

From LSJ

ἀνάγκᾳ δ' οὐδὲ θεοὶ μάχονται → but not even gods fight necessity (Simonides, fr. 37.1.29)

Source

Russian > Greek

ἔργον, ἔρανος, χρέος, ὄφλημα, ὀφείλημα, δάνειον, καθῆκον