2. metaph., with allusion to foreg. signf. and signf. 11, “χωρὶς ἕκαστος εἰς τὸ φρονεῖν ἀσθενής, συμβάλλων δὲ εἰς ἓν πᾶς ἐν τῇ συνόδῳ καὶ τῇ ὡς ἀληθῶς συνέσει τὸ φρονεῖν ἐγέννησε καὶ εὗρε” Plot.6.5.10.
II. faculty of quick comprehension, mother-wit, sagacity, Democr.77, Th.2.62, 3.82, etc.; “οἰκείᾳ ξυνέσει” Id.1.138, cf. Pl.Cra.412a, Phlb. 19d, Arist.EN1143a17, D.18.127, Ev.Luc.2.47, Gal.6.457, etc.; hence of animals, “ὃ [ζῷον] συνέσει . . ὑπερέχει τῶν ἄλλων” Pl.Mx. 237d:—Phrases, “ὅστις γε σύνεσιν ἔχει” Hdt.2.5, 7.49; “ἀρκεῖν ξυνέσει” E.Tr.674; “ξ. καὶ σοφία” Id.HF655 (lyr.); φρόνησίς τε καὶ ξ. Pl. Cra.411a; ς. λαβεῖν, of children, Arist.EN1161b26; μοῖραν ἔχειν συνέσεως (῀ αἰσθήσεως) Democr. ap. Thphr.Sens.71; also with qualifying words added, “ς. φρενῶν” Pi.N.7.60; γνώμης ξ. Th.1.75; “ς. πολιτική” Arist.Pol.1291a28; ἡ περὶ τὴν διάνοιαν ς. Id.HA588a23; ἡ ὑμετέρα ς. as form of address, Sammelb.7433.6 (v A.D.).
2. c. gen. objecti, intelligence in a thing, sagacity in respect to it, Pl.Cra. 412c, D.S.1.1; “περὶ τῶν παρόντων” Th.2.97.
III. conscience = συνείδησις, ἡ ς. (sc. μ᾽ ἀπόλλυσι)“: ὅτι σύνοιδα δείν᾽ εἰργασμένος” E.Or. 396, cf. Men.632, Plb.18.43.13.
b. knowledge, opp. ἄγνοια, Id.de An.410b3.