ἐκκακύνω

From LSJ

βορβόρῳ δ' ὕδωρ λαμπρὸν μιαίνων οὔποθ' εὑρήσεις ποτόν → once limpid waters are stained with mud, you'll never find a drink

Source

Spanish (DGE)

vituperar, repudiar τὴν ἀρετήν Isid.Pel.Ep.M.78.573A.