Ἰλλυρικόν
From LSJ
φιλοσοφίαν καινὴν γὰρ οὗτος φιλοσοφεῖ → this man adopts a new philosophy
English (Strong)
neuter of an adjective from a name of uncertain derivation; (the) Illyrican (shore), i.e. (as a name itself) Illyricum, a region of Europe: Illyricum.
English (Thayer)
Ἰλλυρικοῦ, τό, Illyricum, a region lying between Italy, Germany, Macedonia and Thrace, having on one side the Adriatic Sea, and on the other the Danube: B. D. American edition).