κατα-πλύνω · kata-plynō — LSJ
drench, ὕδατι τὴν κεφαλήν X. Eq. 5.6.
wash out, remove by washing, [ἁλμυρόν τι] Arist. Mete. 357b5:—Pass., καταπλῠθείσης τῆς ἅλμης Thphr. CP 3.24.3: metaph., καταπέπλῠται τὸ πρᾶγμα the affair is washed out, has become worthless, Aeschin. 3.178, cf. Poll. 7.38.