βεκτοῦρα

From LSJ

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

Source

Spanish (DGE)

-ης, ἡ
lat. uectura, dieta de viaje, viático, DP 17.1.