ὑπόνοια
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)
ἡ, (ὑπονοέω)
A suspicion, conjecture, guess, Ar.Pax993 (pl., anap.); τοῦ μὴ συνειληφέναι Sor.2.54, cf. Gal.6.663; ὑπόνοιαι τῶν μελλόντων notions formed of future events, Th.5.87; ἡ ὑ. τῶν ἔργων Id.2.41, cf. E.Ph.1133; in bad sense, ὑπόνοιαι πλασταί D.48.39, cf. Men.Mon.732. 2 suggestion, Phld.Mus.p.71 K.; imputation, Id.D.1.13. II the real meaning which lies at the bottom of a thing, deeper sense, τὰς ὑ. οὐκ ἐπίστανται X.Smp.3.6; esp. covert meaning (such as is conveyed by myths and allegories), ὁ . . νέος οὐχ οἷός τε κρίνειν ὅτι τε ὑ. καὶ ὃ μή Pl.R.378d, cf. Plu.2.19e; opp. αἰσχρολογία, Arist.EN1128a24; καθ' ὑπόνοιαν by insinuation, covertly, Plb.28.4.5, D.H.Rh.9.1; δι' ὑπονοιῶν Alciphr.2.4.