Ζῆν οὐκ ἄξιος, ὅτῳ μηδὲ εἷς ἐστι χρηστὸς φίλος → Life is not worth living if you do not have at least one friend.
ἀδήλητος, ἀδιακόντιστος, ἀνούτατος, ἀνούτητος, ἀπήμαντος, ἄρρηκτος, ἄτμητος, ἀτόρητος, ἄτρωτος, δυσάλωτος, δύστρωτος
Belarusian: непаражальны; Bulgarian: неуязвим; Catalan: invulnerable; Czech: nezranitelný; Dutch: onkwetsbaar; Esperanto: nevundebla; French: invulnérable; German: unverwundbar; Greek: απρόσβλητος, άτρωτος; Ancient Greek: ἀδήλητος, ἀδιακόντιστος, ἀνούτατος, ἀνούτητος, ἀπήμαντος, ἄρρηκτος, ἄτμητος, ἀτόρητος, ἄτρωτος, δυσάλωτος, δύστρωτος; Hungarian: sebezhetetlen; Italian: invulnerabile; Latin: invulnerabilis, atrotus; Norwegian Bokmål: usårbar; Polish: niewrażliwy; Romanian: invulnerabil; Russian: неуязвимый; Slovak: nezraniteľný; Spanish: invulnerable; Ukrainian: невразливий