Ἀκανθοπολίτης

From LSJ

ἵνα οὖν μηδ' ἐν τούτῳ δῷ αὐτοῖς λαβήν (Photius, Fragments on the Epistle to the Romans 483.26) → so that he doesn't give them even here a handle (= an opportunity for refutation)

Source

Spanish (DGE)

-ου, ὁ acantopolita ét. de Acanto, St.Byz.s.u. Ἄκανθος.