τραχὺς ἐντεῦθεν μελάμπυγός τε τοῖς ἐχθροῖς ἅπασιν → he is a tough black-arse towards his enemies, he is a veritable Heracles towards his enemies
hypŏcausis: is, f., = ὑπόκαυσις,I a furnace that heats from below, Vitr. 5, 10, 1 sqq.