Where does “επικός” come from?

επικός (Greek) comes from Ancient Greek ἐπικός, 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.

επικός (Greek): epic