ἱερωστί
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)
Ion. ἱρωστί, Adv.
A in holy sort, piously, Anacr.149.
German (Pape)
[Seite 1243] auf heilige Art, Anacr. bei Apollon. de adv. p. 572, 15.