ἀτειρήεις

From LSJ

κρῖναι δὲ λόγῳ πολύδηριν ἔλεγχον ἐξ ἐμέθεν ῥηθέντα → judge by reason the too much contested argument which has been given by me

Source

Spanish (DGE)

-εσσα, -εν
infatigable, ἔγχος ἀτειρήεντος ... Δηριαδῆος Nonn.D.35.226.