πλύσιμον
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)
[ῠ], τό, washing-place, Gloss.: pl., either, clothes for washing, or, payments for washing, PCair.Zen.457.7 (iii B. C.).