συνεκκαίδεκα
From LSJ
Ῥῦσέ με δεινῶν νοσημάτων, ἱερώτατε, ἱερωσύνην συναρμόσας ἐν χαρᾷ και ἐπιστήμης τὸ πολύτιμον κεφάλαιον → Deliver me from grievous afflictions, most holy one, joining sanctity together in joy with the precious fountainhead of knowledge
English (LSJ)
A sixteen together, by sixteens, D.18.104.
German (Pape)
[Seite 1012] je sechszehn, immer sechszehn zusammen, Dem. 18, 104.