S / subvectĭo
noun

subvectĭo

gen. subvectōnis · gender feminine · decl. 3rd
a carrying; transporting; conveying
a carrying, transporting, conveying, conveyance: frumenti, Liv. 44, 8; Tac. A. 13, 51 fin.Plur.: durae subvectiones, Caes. B. G. 7, 10: marinae, Vitr. 1, 5, 1.