A.culpable, responsible, “ἐπεὶ οὔ τί μοι αἴτιοί εἰσιν” Il.1.153, cf. B.10.34, Hdt.7.214: Comp. “αἰτιώτερος” Th.4.20: Sup., τοὺς αἰτιωτάτους the most guilty, Hdt.6.50; “αἰ. τινος” Id.3.52.
2. Subst., αἴτιος, ὁ, the accused, the culprit, A.Ch.70, etc.; οἱ αἴ. τοῦ πατρός they who have sinned against my father, ib.273:—c. gen. rei, οἱ αἴ. τοῦ φόνου ib.117, cf. S.Ph.590, Hdt.4.200.
II. responsible for, c. gen. rei, Hdt.1.1, etc. ; αἴτιός τινός τινι being the cause of a thing to a person, Lys.13.57, cf. D.23.54, Isoc.8.100: c. inf., “αἴ. τὸν ἠέρα ξηρὸν εἶναι” Hdt.2.26; “τοῦ μὴ φαλακροῦσθαι” Id.3.12, etc.; “αἴ. θανεῖν” S.Ant.1173; “αἰ. πεμφθῆναι ἄγγελον” Antipho 5.23, cf. Lys.13.82; “αἴτιος τὸ σὲ ἀποκρίνασθαι” Pl.La.190e: Comp., “τοῦ . . ἐλευθέραν εἶναι . . αἰτιώτερον” D.24.5, cf. 51.21: Sup. αἰτιώτατος, ἐν τῷ στενῷ ναυμαχῆσαι mainly instrumental in causing the sea-fight, Th.1.74; “αἰ. τοῦ μὴ ἀποθανεῖν” D.20.42; “-ώτατόν τι καὶ τελέως δραστικόν” Phld.D.1.23.