βορβόρῳ δ' ὕδωρ λαμπρὸν μιαίνων οὔποθ' εὑρήσεις ποτόν → once limpid waters are stained with mud, you'll never find a drink
P. ἀκροφύσιον, τό.
projecting part: P. τὸ προέχον.