A.occurrence, happening, incident, freq. with a qualifying epithet, “ἀγαθή” Thgn.590 = Sol.13.70; “ς. κρυόεσσα” Pi.I.1.38; “δεινὴ καὶ μεγάλη” Hdt.3.43; “κατὰ ς. ἀγαθήν” Ar.Av.544 (lyr.); καλὴ ἡ ξ, the conjuncture is fair, Th.1.33; ἐρωτικὴ ξ. an incident of a love-affair, Id.6.54: without any qualifying word, μεταλλαγαὶ συντυχίας changes of fortune, E.HF766 (lyr.); “ς. τις τοιαύτη ἐπεγένετο” Hdt.3.121; “συντυχίῃ ταύτῃ χρησαμένη” Id.5.41; θυμοῦμαι τῇ ξ. Ar.Ra.1006 (anap.); ὡς ἑκάστοις τῆς ξυντυχίας . . ἔσχεν according to the circumstances of each party, Th.7.57; ἅμα τοῦ ἔργου τῇ ξ. at the very moment of action, Id.3.112; ἀπὸ τοιαύτης ξ. Id.5.11; κατὰ συντυχίην by chance, Hdt.3.74, 9.21; κατά τινα ς. Plb.10.32.3, Gal.16.837; κατὰ ς. also, as it happens, as a matter of fact, OGI 331.19 (Pergam., ii B.C.): pl., the chances or incidents of life, circumstances, Th.3.45.
2. abs. also, acc. to the context, of good or evil chances,
a. happy event, success, Pi.P.1.36 (pl.); “συντυχίῃ χρησάμενος καὶ σοφίῃ” Hdt.1.68; θεῶν ἐπὶ συντυχίαις the happy issues due to them, S.Ant.157 (anap.).
b. mishap, mischance, “ξυντυχίᾳ βαρυνόμενοι” Cratin.166, cf. E.Tr.1119 (anap.), El.1358 (anap.), Pl. Phdr.248c, etc.