ἀγανακτέω
Etym. ἄγαν
1. "to feel irritation": metaph. "to be vexed, annoyed, angry, discontented", Ar., Plat.; c. dat. rei, "to be vexed at" a thing, id=Plat.; ἐπί τινι Isocr., ὑπέρ τινος, διά τι Plat.
2. "to be vexed at or with" a person, τινί Xen.; πρός τινα Plut.; κατά τινος Luc.: c. acc. pers., ἀγ. τινὰς ἀποθνήσκοντας "to be angry" at their dying, Plat.