значительная вещь

From LSJ

ζῆν οὐκ ἄξιος, ὅτῳ μηδὲ εἷς ἐστι χρηστὸς φίλοςlife is not worth living if you do not have at least one friend

Source

Russian > Greek

πράγμα, πρῆγμα, πρῆχμα