ἀποβλεπτέον
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)
one must consider, Gal.11.407.
Spanish (DGE)
hay que prestar atención εἰς τὴν τῆς οὐσίας αὐτοῦ σύστασιν ἀποβλεπτέον Gal.11.407, cf. Hsch.
Greek (Liddell-Scott)
ἀποβλεπτέον: Ῥηματ. ἐπίθ. τοῦ ἀποβλέπω, δεῖ ἀποβλέπειν, Γαλην. τ. 2, σ. 3Β.