быть беспечным

From LSJ

ἐπὶ τῷ μὴ κοινωνικῶς χρῆσθαι τοῖς εὐτυχήμασι → for not having used their success in a spirit of partnership

Source

Russian > Greek

ῥᾳθυμέω, ἐπιρρᾳθυμέω