ἔνθρηνος
From LSJ
λίγεια μινύρεται θαμίζουσα μάλιστ' ἀηδών → the sweet-voiced nightingale mourns constantly, the sweet-voiced nightingale most loves to warble
English (LSJ)
-ος, A mournful, ἀνθυπήχησις Schubart Papyruskunde p.42.
Spanish (DGE)
-ον
de lamentación, funesto, lúgubre ἔνθρηνον [ἐλάλησ] ε μέλος Orph.Fr.1054.9.12.