ζῆν οὐκ ἄξιος, ὅτῳ μηδὲ εἷς ἐστι χρηστὸς φίλος → life is not worth living if you do not have at least one friend
ἀθάνατος, ἄβροτος, ἄμβροτος, ἀειθαλής, μακραίων, δηρόβιος, δαρόβιος, δολιχαίων, ἄφθαρτος