ἀγηθής
From LSJ
λίγεια μινύρεται θαμίζουσα μάλιστ' ἀηδών → the sweet-voiced nightingale mourns constantly, the sweet-voiced nightingale most loves to warble
English (LSJ)
ἀγηθές, joyless, cj. in S.Tr.869.
Spanish (DGE)
-ές
no alegre εἰς ἀγηθῆ δώμαθ' a moradas sin alegría S.Fr.583.10.
Dutch (Woordenboekgrieks.nl)
ἀγηθής -ές [ἀ-, γῆθος vreugdeloos.