ἀχαριστία

A. ingratitude, X. Cyr. 1.2.7; εἰς ἀ. ἄγειν D. 18.316: in pl., ἀχαριστίαι πρὸς ἀνθρώπους Phld. Herc. 1251.10; ὀλιγωρίας καὶ ἀ. ib.1457.9.

2. ungraciousness, ἀρρυθμία καὶ ἀ. Pl. R. 411e.