transversarius
From LSJ
βορβόρῳ δ' ὕδωρ λαμπρὸν μιαίνων οὔποθ' εὑρήσεις ποτόν → once limpid waters are stained with mud, you'll never find a drink
Latin > English (Lewis & Short)
transversārĭus: a, um, adj. transversus,
I lying across, cross-. transverse: tigna, cross-beams, Caes. B. C. 2, 15.—As subst.: transversārĭa, ōrum, n. (sc. ligna), cross-beams, Vitr. 8, 6; 10, 11 fin.