διοιστρέω
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)
strengthd. for οἰστρέω, D.S.4.12, Philostr.VA1.33 (Pass.).
Greek (Liddell-Scott)
διοιστρέω: ἐπιτεταμ. οἰστρέω, Διόδ. 4. 12, Φιλόστρ. 42, ἐν τῷ παθ.