Where does “νήπιος” come from?

νήπιος (Ancient Greek) comes from Ancient Greek ἔπος, from Ancient Greek ϝέπος, from Proto-Hellenic wékʷos, from Proto-Indo-European wékʷos, from Proto-Indo-European wekʷ- — to speak, to sound out.

νήπιος (Ancient Greek): childish, infantile, juvenile, young; infant,...