S / surreptĭo
noun

surreptĭo

gen. surreptōnis · gender feminine · decl. 3rd
a stealing; purloining; theft
a stealing, purloining, theft: surreptionem factitasse, App. M. 10, p. 245, 32: per surreptionem elicere, i. e. by deception or subreption, Cod. Just. 1, 14, 2.