ἀναμφισβητήσιμος

From LSJ

Τραφὲν ὄρεσι καὶ φάραγξιν ἀγρίαις, κήρυξ πέφυκα τῆς λόγου ὑμνῳδίας. Φωνήν μὲν οὐκ ἔναρθρον, εὔηχον δ' ἔχω (Byzantine riddle) → Raised in the mountains and wild ravines, I have become the herald of hymns that are sung. I have no articulate voice...

Source

German (Pape)

[Seite 199] unbestreitbar, gewiß.

Greek (Liddell-Scott)

ἀναμφισβητήσιμος: -ον, μὴ ἐπιδεχόμενος ἀμφισβήτησιν, Εὐσεβ. Βίος Κωνστ.