ἀγνωμοσύνη

English (LSJ)

ἡ,

   A want of acquaintance with a thing, Pl.Tht.199d.    2 want of sense, folly, Thgn.896, Democr.175; senseless pride, arrogance, Hdt.2.172, E.Ba.885 (lyr.); πρὸς ἀ. τραπέσθαι Hdt.4.93; ἀγνωμοσύνῃ χρᾶσθαι Id.5.83; ὑπ' ἀγνωμοσύνης Id.9.3.    3 want of feeling, unkindness, D.18.252; θεῶν ἀ. S.Tr.1266(dub.); ἀ. τύχης, Lat. iniquitas fortunae, D.18.207.    4 in pl., misunderstandings, X.An.2.5.6.