ἀργέτι
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
English (LSJ)
ἀργέτα,
A v. ἀργής:—nom. ἀργέτις, ἡ, = ἀργήεσσα, Ἠώς Nonn.D.16.124; voc. ἀργέτι AP5.253 (Paul. Sil.):—also nom. ἀργέτᾰ Μήνη Max.587; ἀργέται ἵπποι Orac. ap. Phleg.Mir.3.