ἀποτυγχάνειν
From LSJ
Ζῆν οὐκ ἄξιος, ὅτῳ μηδὲ εἷς ἐστι χρηστὸς φίλος → Life is not worth living if you do not have at least one friend.
Greek > English (Woodhouse Verbs Reversed)
(see also ἀποτυγχάνω): miss, fail in, not succeed in, not to hit, fail in hitting