κιστέρνα
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)
German (Pape)
[Seite 1443] ἡ, das lat. cisterna, Hesych.
Greek (Liddell-Scott)
κιστέρνα: ἡ, Λατ. cisterna = δεξαμενή, Χρον. Πασχάλ. 578, 10. ― 593, 7, κ. ἀλλ.