S / substrāmen
noun

substrāmen

gen. substrāmĭnis · gender neuter · decl. 3rd
what is strewn under; litter
what is strewn under, litter: molle, Varr. R. R. 3, 10, 4; 3, 6, 5; 3, 9, 8.—
supports by extension
Transf., supports: lubrica roboreis aderant substramina plaustris, i. e. rollers, Sil. 12, 444.