ἀνταναμένω
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)
A wait instead of taking active measures, c. inf., Th.3.12.
German (Pape)
[Seite 244] dagegen erwarten, Thuc. 3, 12.