Ζῆν οὐκ ἄξιος, ὅτῳ μηδὲ εἷς ἐστι χρηστὸς φίλος → Life is not worth living if you do not have at least one friend.
weak: P. and V. ἀσθενής, P. ἄρρωστος, ἀπειρηκώς, V. ἄναλκις, ἀμαυρός, ἄναρθρος.
infirm of purpose: Ar. and P. μαλακός, Ar. and V. μαλθακός; see cowardly.
be infirm, v.: P. and V. ἀσθενεῖν. P. ἀρρωστεῖν.