ἄπειρος
ἄπειρος
πεῖρα
without trial or experience of a thing, unused to, unacquainted with, Lat. expers, c. gen., ἄθλων Theogn.; τυράννων Hdt., etc.
absol. inexperienced, ignorant, Pind., Aesch., etc.
adv., ἀπείρως ἔχειν τινός to be ignorant of a thing, Hdt.