ἀχάριστος
Etym. χαρίζομαι
I. "ungracious, unpleasant, unpleasing", Od.; irreg. comp., δόρπου ἀχαρίστερον (for -ιστότερον) id=Od.: "without grace or charms", Xen.
II. of persons, "ungracious, unfavourable", Theogn.
2. "ungrateful, thankless", Hdt., attic; τινι Eur.; πρός τινα Xen.
III. adv. -τως, "with an ill-will", id=Xen.; ἀχαρίστως ἔχει μοι "thanks are wanting" to me, id=Xen.