τραχὺς ἐντεῦθεν μελάμπυγός τε τοῖς ἐχθροῖς ἅπασιν → he is a tough black-arse towards his enemies, he is a veritable Heracles towards his enemies
a primitive root; to split or tear; figuratively, to upbraid: cleave, (be) cloven ((footed)), rend, stay.