S / suffossĭo
noun

suffossĭo

gen. suffossōnis · gender feminine · decl. 3rd
(), , suffodio
a digging under; undermining; mines by extension
a digging under, undermining, Vulg. Jer. 51, 58.—Transf., in plur., concr., mines, Vitr. 1, 5, 5 (dub.): cum ipsum solum subfossionibus tremeret, Sen. Ep. 49, 8.