ἀγνωμοσία

From LSJ

Ubi idem et maximus et honestissimus amor est, aliquando praestat morte jungi, quam vita distrahi → Where indeed the greatest and most honourable love exists, it is much better to be joined by death, than separated by life.

Valerius Maximus, De Factis Dictisque

Spanish (DGE)

-ας, ἡ insensatez, imprudencia Tz. en An.Ox.4.115.5.