ποταμῷ γὰρ οὐκ ἔστιν ἐμβῆναι δὶς τῷ αὐτῷ → it is impossible to step twice in the same river, you cannot step twice into the same rivers
sŭper-ductĭo: ōnis, f. super-duco,
I a drawing over, erasure, Dig. 28, 4, 1, § 1.
sŭperductĭō, surcharge (d’écriture) : Ulp. Dig. 28, 4, 1.