inexperto
From LSJ
κοινὸν τύχη, γνώμη δὲ τῶν κεκτημένων → good luck is anyone's, judgment belongs only to those who possess it
Spanish > Greek
ἀπραγμάτευτος, ἀνεπιστήμων, ἀνεπιτήδειος, ἀτρίβων, αὐτοσχεδιαστής, ἄπειρος, ἀπειροπόλεμος, ἄτριψ, ἄτριβος, ἀπείρητος, ἀβάδιστος, ἀταλός, ἄγευστος, ἀδηνής