ἀγαθός deriv. uncertain
good, Lat. bonus:
I.of persons,
1.in early times, good, gentle, noble, in reference to birth, opp. to κακοί, πατρὸς δ᾽ εἴμ᾽ ἀγαθοῖο, θεὰ δέ με γείνατο μήτηρ Il.; ἀγαθοὶ καὶ ἐξ ἀγαθῶν, Lat. boni bonis prognati, Plat.; with this early sense was associated that of wealth and power, like Lat. optimus quisque in Sallust and Cicero; esp. in the phrase καλοὶ κἀγαθοί (v. καλοκἀγαθός).
2.good, brave, since these qualities were attributed to the Chiefs, Il.; ἀγαθὸς ἐν ὑσμίνῃ, βοὴν ἀγαθός, πὺξ ἀγαθός, etc., Hom.; ἀγ. τὰ πολέμια, τὰ πολιτικά Hdt., etc.;—also c. dat., ἀγ. πολέμῳ Xen.;—and, ἀγ. εἴς τι, περί τι, πρός τι Plat., etc.; lastly, c. inf., ἀγ. μάχεσθαι, ἱππεύεσθαι, good at fighting, etc., Hdt.
3.good, in moral sense, Plat., etc.
II.of things,
1.good, serviceable, Ἰθάκη ἀγαθὴ κουροτρόφος Od.; ἀγ. τοῖς τοκεῦσι, τῇ πόλει Xen.; c. gen., εἴ τι οἶδα πυρετοῦ ἀγ. good for fever, id=Xen.; ἀγαθόν [ἐστι], c. inf., it is good to do so and so, Hom., etc.
2.ἀγαθόν, τό, a good, of persons, φίλον, ὃ μέγιστον ἀγ. εἶναι φασι Xen.; ἐπ᾽ ἀγαθῷ τοῖς πολίταις Ar.; τὸ ἀγαθόν or τἀγαθόν, the good, summum bonum, Plat., etc.; in pl., ἀγαθά, τά, the goods of fortune, wealth, Hdt., etc.; also good qualities, of a horse, Xen.