ἀνομολογητέον
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)
A one must admit, τοῦτο περὶ αὐτῶν Pl.R.452e, cf. Lg.737c.
Greek (Liddell-Scott)
ἀνομολογητέον: ῥημ. ἐπίθ., πρέπει τις νὰ ὁμολογήσῃ, νὰ παραδεχθῇ, τοῦτο περὶ αὐτῶν Πλάτ. Πολ. 452Ε, πρβλ. Νόμ. 737C.