κάλλιστον ἐφόδιον τῷ γήρᾳ ἡ παιδεία (Aristotle, quoted by Diogenes Laertius 5.21) → the finest provision for old age is education
ἀλλοδαπός, ἄγλωσσος, ἄγλωττος, ἔπηλυς, ἐπηλύτης, ἐπήλυτος, ξεῖνος, ξένος, ὀθνεῖος