κακοηχής
From LSJ
τραχὺς ἐντεῦθεν μελάμπυγός τε τοῖς ἐχθροῖς ἅπασιν → he is a tough black-arse towards his enemies, he is a veritable Heracles towards his enemies
English (LSJ)
ές,
A ill-sounding, dissonant, Phld.Po.2.42: Comp. ἠχὴ -εστέρα Adam.2.42:—also κᾰκό-ηχος, ον, Suid. s.v. ἐκμελές.
German (Pape)
[Seite 1300] ές, schlecht tönend, Sp.