βρεφοπρεπής
From LSJ
Ἓν οἶδα, ὅτι οὐδὲν οἶδα → I know only one thing, that I know nothing | all I know is that I know nothing.
Spanish (DGE)
-ές
1 propio de un niño, infantil ὅτιπερ νηπιῶδες ἂν εἴη καὶ β. ... περιπλανῆσαι Nil.M.79.577D, ἀντ' ἄλλης ... βρεφοπρεποῦς ὁμιλίας Diad.Perf.61.
2 adv. -ῶς de manera infantil ἄγαν β. κομιζόμενοι Nil.M.79.221A.