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From LSJ
κάλλιστον ἐφόδιον τῷ γήρᾳ ἡ παιδεία (Aristotle, quoted by Diogenes Laertius 5.21) → the finest provision for old age is education
Russian > Greek
ἀνάγραπτος, ἄληστος, ἀνέκπλυτος, δευσοποιός, δυσκατάσβεστος, δυσαπότριπτος, δυσέκνιπτος