εἴδησις
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)
εως, ἡ,
A knowledge, τῶν πραγμάτων Nausiph.2; = γνῶσις, Arist.de An.402a1; γραμμάτων S.E.M.1.44, cf. SIG685.24 (Magn. Mae., ii B. C.), LXX Si.42.18, Ph.1.335, Porph.Sent.32, Plot.4.4.12, al., Iamb.Protr.3, etc.: in pl., forms of knowledge, μαρτυροῦσι δὲ καὶ αἱ αἰσθήσεις, εἰδήσεις εἶναι θέλουσαι Plot.6.7.29.