δεδειγμένως

From LSJ

Kατεσκευάσθη τὸ ἱερὸν τοῦτο ποτήριον ... ἐν ἔτει ,αω'α' → Τhis holy cup was made ... in the year 1801

Source

Spanish (DGE)

adv. sobre part. perf. pas. de δείκνυμι evidentemente Iust.Phil.Qu.Chr.M.6.1445D.