ἀμαρτάνειν

From LSJ

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

Source

Greek > English (Woodhouse Verbs Reversed)

lose, be baulked of, be deceived in (see also: ἁμαρτάνω)