ἐφηλόω
From LSJ
Δύο γὰρ, ἐπιστήμη τε καὶ δόξα, ὧν τὸ μὲν ἐπίστασθαι ποιέει, τὸ δὲ ἀγνοεῖν → Two different things are science and belief: the one brings knowledge, the other ignorance
English (LSJ)
A nail on, in Pass., Apollod.Poliorc.158.8, Ath.Mech.25.3: metaph., τῶνδ' ἐφήλωται τορῶς γόμφος διαμπάξ the bolt is driven home, i. e. it is irrevocably fixed, A.Supp.944; cf. ἐφαλόω.