τριτεύω
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)
A hold the office of τριτευτής, CIG3491, IGRom.4.1244 (both Thyatira), 414 (Pergam.); dub. sens. in PStrassb. 114.6 (ii B. C.).