ἐμποδοστάτης
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)
English (LSJ)
ου, ὁ, (στῆναι)
A in the way, ib.1 Ch.2.7, Suid.