ἀγνώμ-ων · agnōm-ōn — LSJ
ill-judging, senseless, Thgn. 1260 codd. (s.v.l.), Pi. O. 8.60, Pl. Phdr. 275b; ὥσπερ κυνίδιον τοῖς εἴκουσιν ἀ. Phld. Lib. p.10 O.; opp. μετὰ λογισμοῦ πράττειν, Men. 617; inconsiderate, τὸ ἄ. καὶ θυμοειδές Hp. Aër. 16. Adv. -όνως senselessly, X. HG 6.3.11, etc.; ἀ. ἔχειν D. 2.26.
headstrong, reckless, (in Comp.) Hdt. 9.41: Sup., X. Mem. 1.2.26.
unfeeling, hard-hearted, Φοίβῳ τε κἀμοὶ μὴ γένησθʼ ἀγνώμονες S. OC 86; of judges, X. Mem. 2.8.5; joined with ἀχάριστος, Id. Cyr. 8.3.49, cf. Mem. 2.10.3, D. 21.97; esp. ignoring oneʼs debts, Ulp.ad D. 2.26, Jul. Or. 3.117e (Comp.); ἀ. περὶ τὰς ἀποδόσεις Luc. Herm. 10.
unknowing, in ignorance, ἀ. πλανᾶσθαι Hp. Vict. 1.6.
of things, senseless, brute, Aeschin. 3.244; also φρονοῦσαν θνητὰ κοὐκ ἀγνώμονα (neut. pl.) S. Tr. 473.
cruel, πρᾶγμα ἄ. πάσχειν Parth. 17.5.
of horses, without the teeth that tell the age (γνώμονες) Poll. 1.182. [ᾰγν- only in Man. 5.338.]