πεντήρης
From LSJ
Περὶ τοῦ ἐπέκεινα τοῦ νοῦ κατὰ μὲν νόησιν πολλὰ λέγεται, θεωρεῖται δὲ ἀνοησίᾳ κρείττονι νοήσεως → On the subject of that which is beyond intellect, many statements are made on the basis of intellection, but it may be immediately cognised only by means of a non-intellection superior to intellection
English (LSJ)
(sc. ναῦς), ἡ,
A quinquereme, Plb.8.4.2, al. (but f.l. for πεντετηρίς Hdt.6.87) ; in full, ναῦς π. D.S.2.5, 14.41 : πεντηρικὰ πλοῖα, σκάφη, Plb.1.59.8, 3.41.2, cf. D.S.14.41.
German (Pape)
[Seite 559] ες, fünfruderig, mit fünf Reihen Ruderbänken, vgl. τριήρης; Her. 6, 87; Pol. 8, 6, 2; D. Sic. 20, 49.